Factorize 2x 2 - 21x 45 - WAEC Mathematics 1993 Question
Factorize 2x\(^2\) - 21x + 45
A
(2x - 9)(x - 5)
B
(2x-15)(x + 3)
C
(2x +15)(x - 3)
D
(2x -15(x - 3)
correct option: d
2x\(^2\) - 21x + 45
= 2x\(^2\) - 15x - 6x + 45
= x(2x - 15) - 3(2x - 15)
= (x - 3)(2x - 15)
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