Question

решите урпанение
$2 {x}^{2} + {x}^{2} - 8x - 4 = 0$

Answer 1

2х^3+х^2)-(8х+4)=0
х^2(2х+1)-4(2х+1)=0
(2х+1)(х^2-4)=0
(2х+1)(х-2)(х+2)=0
2х+1=0
2х=-1
х1=-1/2
х-2=0
х2=2
х+2=0
х3=-2