Factorize 2t2 t - 15 - JAMB Mathematics 2007 Question
Factorize 2t2 + t - 15
A
(t + 3)(2t - 5)
B
(2t + 3)(t - 5)
C
(2t - 3)(t + 5)
D
(t + 3)(t - 5)
correct option: a
2t2 + t - 15 = 2t2 - 5t + 6t - 15
= t(2t - 5) + 3(2t - 5) = (t + 3)(2t - 5)
= t(2t - 5) + 3(2t - 5) = (t + 3)(2t - 5)
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