Question

x square - 11x - 80 factorise the question

Answer 1

x^2 - 11x - 80

=> x^2 - 16x + 5x - 80

=> x ( x -16) + 5(x - 16)

=> ( x - 16)(x + 5)

Answer 2

= x^2 - 11x - 80
= x^2 + 5x - 16x - 80
= x(x + 5) - 16(x + 5)
= (x - 16) (x + 5)
x = 16, x = (-5)