Question

(x+4)в квадрате - х в квадрате =2х +1

Answer 1

(х+4-х)*(х+х+4)=2х+1
4(2х+4)=2х+1
8х+16=2х+1
6х=-15
х=-5/2

Answer 2

X^2+8x+16-x^2=2x+1
8x-2x=-16+1
6x=-15
x=-15/6=-5/2=-2.5