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Mathematics

Grade10

Easy

Question

Factorise x²– 11x + 24.

(x – 3) (x + 8)
(x – 3) (x – 8)
(x + 3) (x – 8)
(x + 3) (x + 8)

The correct answer is: (x – 3) (x – 8)

$text We need two numbers whose product is end text 24 text and whose sum is end text minus 11 text . end text$

The third line contains the numbers that we want. Thus
$x squared minus 11 x plus 24 equals left parenthesis x minus 3 right parenthesis left parenthesis x minus 8 right parenthesis$

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