Which of the following is a factor of 2 - x - x2?

A.

1 - x

B.

1 + x

C.

x - 1

D.

2 - x

View answer & explanation

Correct answer is A

2 - x - x2; (2 - 2x) + (x - x2)

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

= (1 - x)(2 + x)

= 1 - x

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