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JAMB - Mathematics (2015 - No. 20)

Factorize \( x^2 − 2x − 15 \)
(x + 3)2
(x + 5)(x − 3)
(x − 5)2
(x − 5)(x + 3)

설명

x2 − 2x − 15

(x2 − 5x) + (3x − 15)

x(x − 5)+ 3(x − 5)

(x − 5)(x + 3)

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