Which of the following is a factor of 2 – x – x2?
-
A.
1 – x -
B.
1 + x -
C.
x – 1 -
D.
2 – x
Correct Answer: Option A
Explanation
2 – x – x2; (2 – 2x) + (x – x2)
= 2(1 – x) + x(1 – x)
= (1 – x)(2 + x)
= 1 – x
2 – x – x2; (2 – 2x) + (x – x2)
= 2(1 – x) + x(1 – x)
= (1 – x)(2 + x)
= 1 – x