2015
Mathematics
JAMB
Factorize x2 −2x−15
A.
(x + 3)2
B.
(x + 5)(x − 3)
C.
(x − 5)2
D.
(x − 5)(x + 3)
Correct Answer: (x − 5)(x + 3)
Explanation
x22 − 2x − 15 (x2 − 5x) + (3x − 15) x(x − 5)+ 3(x − 5) (x − 5)(x + 3)
x22 − 2x − 15 (x2 − 5x) + (3x − 15) x(x − 5)+ 3(x − 5) (x − 5)(x + 3)THIS WEEK's
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