Question

x^2 - 15x + 56 . Factorise :-

Answer 1

x²-15x+56
x²-8x-7x+56
x(x-8)-7(x-8)
(x-7)(x-8)

Answer 2

Hey mate your answer is
$= {x}^{2} - 15x + 56 \\ = {x}^{2} - 7x - 8x + 56 \\ = x(x - 7) - 8(x - 7) \\ = (x - 8)(x - 7)$
Hope it helps you mate!!!!!