Question

factorise:- 2x² - 7x -15​

Answer 1

Answer:

$(2x2-7x-39)=(2x-13)(x+3)$

Answer 2

2x^2-7x-15

2x^2-(3-10)x-15

2x^2-3x+10x-15

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

(x+5)(2x-3)

x+5=0 or 2x-3=0

x=-5 or x=3/2