(11+2х)(32+2х)=646 Помогите

Question

(11+2х)(32+2х)=646
Помогите

Answer 1

352+22x+64x+4x^2-646=0
4x^2+86x-294=0
D=86^2-4*4*(-294)=7396+4704=√12100=110^2>0
x1=-86-110/2=-98
x2=-86+110/2=12
Ответ:x1=-98;x2=12