Maths-
General
Easy

Question

Use polynomial identities to factor the polynomials or simplify the expressions :
x to the power of 9 minus 8

The correct answer is: Thus, the simplified expression is; x^9 - 8 = (x^3 - 2) (x^6+2x^3+4)


    ANSWER:
    Hint:
    open parentheses straight a cubed minus straight b cubed close parentheses equals left parenthesis straight a minus straight b right parenthesis open parentheses straight a squared plus ab plus straight b squared close parentheses, here a and b can be real values, variables or multiples of both.
    We are asked to use polynomial identities to factorize the given expression.
    Step 1 of 2:
    The given expression is x to the power of 9 minus 8text  Ne can rewrite it as,  end text x to the power of 9 minus 8 equals open parentheses x cubed close parentheses cubed minus left parenthesis 2 right parenthesis cubed text . It is of the form  end text open parentheses a cubed minus b cubed close parentheses text .  end text
    text  Here,  end text a equals x cubed straight & b equals 2 text .  end text
    Step 2 of 2:
    Use the polynomial identity to simplify the expression;
    table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell x to the power of 9 minus 8 equals open parentheses x cubed close parentheses cubed minus left parenthesis 2 right parenthesis to the power of 3 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space end exponent end cell row cell equals open parentheses x cubed minus 2 close parentheses open parentheses open parentheses x cubed close parentheses squared plus open parentheses x cubed close parentheses left parenthesis 2 right parenthesis plus open parentheses 2 squared close parentheses close parentheses space space space space space space end cell row cell equals open parentheses x cubed minus 2 close parentheses open parentheses x to the power of 6 plus 2 x cubed plus 4 close parentheses space space space space space space space space space space space space space space space space space space space space space space end cell end table space space space space space space space space space space space space
    Thus, the simplified expression is; straight x to the power of 9 minus 8 equals open parentheses straight x cubed minus 2 close parentheses open parentheses straight x to the power of 6 plus 2 straight x cubed plus 4 close parentheses.
    Note:
    Polynomial identities are used to reduce the time and space while you solve higher degree polynomial expressions.

    Related Questions to study

    General
    Maths-

    Use Pascal triangle to expandleft parenthesis x plus y right parenthesis to the power of 5

    Use Pascal triangle to expandleft parenthesis x plus y right parenthesis to the power of 5

    Maths-General
    General
    Maths-

    Use binomial theorem to expand (x - 3)4

    For the expansion of an expression (x + y) , we would have n+1 terms. This is something you need to keep in mind.

    Use binomial theorem to expand (x - 3)4

    Maths-General

    For the expansion of an expression (x + y) , we would have n+1 terms. This is something you need to keep in mind.

    General
    Maths-

    Use polynomial identities to factor the polynomials or simplify the expressions :
    x to the power of 8 minus 9

    Use polynomial identities to factor the polynomials or simplify the expressions :
    x to the power of 8 minus 9

    Maths-General
    parallel
    General
    Maths-

    How is left parenthesis x plus y right parenthesis to the power of n obtained from left parenthesis x plus y right parenthesis to the power of n minus 1 end exponent

    How is left parenthesis x plus y right parenthesis to the power of n obtained from left parenthesis x plus y right parenthesis to the power of n minus 1 end exponent

    Maths-General
    General
    Maths-

    Use Pascal triangle to expand (x + y)6

    The expansion of the polynomial (x + y)6  can be found using the values of 6Cr

    Use Pascal triangle to expand (x + y)6

    Maths-General

    The expansion of the polynomial (x + y)6  can be found using the values of 6Cr

    General
    Maths-

    Use polynomial identities to multiply the expressions ?
    open parentheses 25 straight x squared minus 15 straight y squared close parentheses open parentheses 25 straight x squared plus 15 straight y squared close parentheses

    Use polynomial identities to multiply the expressions ?
    open parentheses 25 straight x squared minus 15 straight y squared close parentheses open parentheses 25 straight x squared plus 15 straight y squared close parentheses

    Maths-General
    parallel
    General
    Maths-

    How can you use polynomial identities to factor polynomials and simplify numerical expressions ?
    12 cubed plus 2 cubed

    How can you use polynomial identities to factor polynomials and simplify numerical expressions ?
    12 cubed plus 2 cubed

    Maths-General
    General
    Maths-

    Use Pascal triangle to expand left parenthesis x plus y right parenthesis to the power of 5

    The answer cam also be found by expanding the formula of 5Cr .

    Use Pascal triangle to expand left parenthesis x plus y right parenthesis to the power of 5

    Maths-General

    The answer cam also be found by expanding the formula of 5Cr .

    General
    Maths-

    Use polynomial identities to multiply the expressions ?
    open parentheses 3 x squared minus 4 x y close parentheses open parentheses 3 x squared plus 4 x y close parentheses

    Use polynomial identities to multiply the expressions ?
    open parentheses 3 x squared minus 4 x y close parentheses open parentheses 3 x squared plus 4 x y close parentheses

    Maths-General
    parallel
    General
    Maths-

    How can you use polynomial identities to factor polynomials and simplify numerical expressions ?
    27 x to the power of 9 minus 343 y to the power of 6

    How can you use polynomial identities to factor polynomials and simplify numerical expressions ?
    27 x to the power of 9 minus 343 y to the power of 6

    Maths-General
    General
    Maths-

    Use polynomial identities to multiply the expressions ?

    left parenthesis 10 plus 21 right parenthesis squared

    Use polynomial identities to multiply the expressions ?

    left parenthesis 10 plus 21 right parenthesis squared

    Maths-General
    General
    Maths-

    How is ( x + y )n obtained from (x + y)n-1

    You could also get the value of left parenthesis x plus y right parenthesis to the power of n from left parenthesis x plus y right parenthesis to the power of n minus 1 end exponent by just multiplying a (  x + y)  with left parenthesis x plus y right parenthesis to the power of n minus 1 end exponent .

    How is ( x + y )n obtained from (x + y)n-1

    Maths-General

    You could also get the value of left parenthesis x plus y right parenthesis to the power of n from left parenthesis x plus y right parenthesis to the power of n minus 1 end exponent by just multiplying a (  x + y)  with left parenthesis x plus y right parenthesis to the power of n minus 1 end exponent .

    parallel
    General
    Maths-

    How can you use polynomial identities to factor polynomials and simplify numerical expressions ?
    m to the power of 8 minus 9 n to the power of 10

    How can you use polynomial identities to factor polynomials and simplify numerical expressions ?
    m to the power of 8 minus 9 n to the power of 10

    Maths-General
    General
    Maths-

    Use polynomial identities to multiply the expressions ?
    left parenthesis 7 plus 9 right parenthesis squared

    Use polynomial identities to multiply the expressions ?
    left parenthesis 7 plus 9 right parenthesis squared

    Maths-General
    General
    Maths-

    How can you use polynomial identities to factor polynomials and simplify numerical expressions ? 123 + 23

    This can also be done by finding the cube of each values and adding them. But that might be time consuming. Hence, we use these identities.

    How can you use polynomial identities to factor polynomials and simplify numerical expressions ? 123 + 23

    Maths-General

    This can also be done by finding the cube of each values and adding them. But that might be time consuming. Hence, we use these identities.

    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.