Question

трехчлен
5х^2+2х-3=5(х+1)(х-1)

Answer 1

5х²+2х-3=5(х²+х-х-1)
5х²+2х-3=5(х²-1)
5х²+2х-3=5х²-5
2х-3=-5
2х= - 2
х= -1