Given that (2x – 1)(x + 5) = 2x2 – mx – 5, what is the value of m
- 11
- 5
-
-9
- -10
The correct answer is: C
Explanation
(2x - 1)(x + 5) = 2x2 - mx - 52x2 + 10x - x - 5
= 2x2 + 9x - 5 = 2x2 - mx - 5
comparing the co-efficient of x
-m = 9
m = -9