Which of the following is a factor of 2 - x - x2?
A
1 - x
B
1 + x
C
x - 1
D
2 - x
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
2 - x - x2; (2 - 2x) + (x - x2)
= 2(1 - x) + x(1 - x)
= (1 - x)(2 + x)
= 1 - x
Source: Myschool Past Questions Archive (Record #36288)