Given that (2x - 1)(x + 5) = 2x2 - mx - 5, what is the value of m
11
5
-9
-10
Correct answer is C
(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
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