(7х -1)(2+x)=(x-4)(x+4)

Question

(7х -1)(2+x)=(x-4)(x+4)

Answer 1

14x-2+7x^2-x=x^2-4x+4x-16
14x-2+7x^2-x -x^2+4x-4x +16=0
6x^2+13x+14=0
D =169 -4*14*6
D=-167 корней нет