The factors of 6x – 5 – x2 are
-
A.
-(x + 3)(x + 2) -
B.
(x + 5)(x + 1) -
C.
(x – 5)(1 – x) -
D.
(x + 1)(x + 5)
Correct Answer: Option C
Explanation
6x – 5 – x2 = (-1)(-x2 – 5 + 6x)
= x2 – 6x + 5
= (x – 5)(x – 1)
-(x – 1) = 1 – x
= (x – 5)(1 – x)
The factors of 6x – 5 – x2 are
6x – 5 – x2 = (-1)(-x2 – 5 + 6x)
= x2 – 6x + 5
= (x – 5)(x – 1)
-(x – 1) = 1 – x
= (x – 5)(1 – x)