Question

решите уравнение
(х+1)(х+2)-х^2=5х+4
(х+1)^2=х^2+1

Answer 1

(х+1)(х+2)-х^2=5х+4
х²+2х+х+2-х²=5х+4
3х+2=5х+4
3х-5х=4-2
-2х=2
х=2/(-2)
х=-1
(х+1)^2=х^2+1
х²+2х+1=х²+1
х²+2х-х²=1-1
2х=0
х=0/2
х=0