7(x+8) + (x+8) (x-8)

Question

7(x+8) + (x+8) (x-8)

Answer 1

7(x+8)+(x+8)(x-8)=7x+56+x^2-64=x^2+7x-8=(x-1)(x+8)

Answer 2

7х+56+х^2-8x+8x-64=x^2+7x-8
D=49-4*-8=81=9
x1=-7+9/2=1
x2=-7-9/2=-8
Ответ:1;-8