3 years ago

X^2+x-2/1-x^2 ÷ 2x^2-6x-20/x^2-4x-5

1 answer:

7 0

X^2+x-2/1-x^2 ÷ 2x^2-6x-20/x^2-4x-5

(x + 2)(x - 1) (x - 5)(x + 1)
= ------------------- * ---------------------
(1 + x)(1- x) 2(x + 2)(x - 5)

 (x - 1)
= ----------
2(1- x)

- (1 - x)
= -------------
2(1 - x)

= -1/2

answer
-1/2

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