Question

by spliting middle terms 2x2+x-15

Answer 1

2x^2 + x - 15

= 2x^2 + 6x - 5x - 15

= 2x ( x + 3 ) -5 ( x + 3)

= ( x + 3 )( 2x - 5 )

Answer 2

(2x^2+ 6x)-(5x -15)
=2x(x+3)-5(x+3)
=(2x-5) (x+3)