Maths-
General
Easy
Question
What is the simplified form of the rational expression
? What is its domain?
The correct answer is: The domain of the expression is the set of values excluding the zero value of the denominator. That is: x - 3 = 0 x = 3
ANSWER:
Hint:
The expansions of certain identities are:


We are asked to simplify the expression and find its domain.
Step 2 of 3:
Simplify the denominator of the expression:


Step 2 of 3:
Simplify the denominator of the expression:




Step 3 of 3:
The domain of the expression is the set of values excluding the zero value of the denominator. That is:


Hence, the domain is:
Note:
When you find the domain of a rational expression exclude the values that bring zero to the denominator.
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