(2х-7)(х+8)=х(х+1)-81

Question

(2х-7)(х+8)=х(х+1)-81

Answer 1

(2х-7)(х+8)=х(х+1)-81
2x^2+16x-7x-56=x^2+x-81
2x^2-x^2+16x-7x-x=56-81
x^2+8x+25=0
D=64-100=-36
Нет корней