Given that (2x – 1)(x + 5) = 2×2 – mx – 5, what is…

Given that (2x – 1)(x + 5) = 2x² – mx – 5, what is the value of m

Correct Answer: Option C

Explanation

(2x – 1)(x + 5) = 2x² – mx – 5
2x² + 10x – x – 5
= 2x² + 9x – 5 = 2x² – mx – 5
comparing the co-efficient of x
-m = 9
m = -9