Question

factorise the following expression X2-11x-42

Answer 1

x2-(11x)-42=0
x2-14x+3x-42=0
x(x-14)+3(x-14)=0
(x+3)(x-14)=0
x= -3 or 14

Answer 2

x2-(11x)-42=0

x2-14x+3x-42=0

x(x-14)+3(x-14)=0

(x+3)(x-14)=0

x= -3 or 14