Question

Factorize the following:
1. x2 - 2x - 15​

Answer 1

★ x² - 2x - 15

= x² - 5x + 3x - 15

= x ( x - 5 ) + 3 ( x - 5 )

=( x - 5 )(x + 3 )

Answer 2

x2-2x-15

x2-5x+3x-15

X(x-5)+3(x-5)

(X+3)(x-5)

equating (X+3)(x-5) to 0

x=-3

X=5