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Post-UTME Mathematics 2010 Objective — Question 7

Question 7 of 10 from the Post-UTME Screening (Post-UTME) Mathematics 2010 Objective paper, with the correct answer and a full explanation.

Factorize the following expression: 2x²+x-15

A. (2x+5)(x-3)
B. (2x-5)(x+3)Correct
C. (2x-5)(x-3)
D. (2x-3)(x+5)

Explanation

2x²+x-15 = 2x²+6x-5x-15 = 2x(x+3)-5(x+3) = (2x-5)(x+3).

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