2х²+5х-3=0
D = 5²-4*2*(-3) = 25+24 = 49 = 7²
х12 = (-5±7)/(2*2)
х1 = 1/2
х2 = -3
2х²+5х-3=2*(х-(1/2))(х+3) = (х-1)(х+3)
2х²+5х-3=0
D = 5²-4*2*(-3) = 25+24 = 49 = 7²
х12 = (-5±7)/(2*2)
х1 = 1/2
х2 = -3
2х²+5х-3=2*(х-(1/2))(х+3) = (х-1)(х+3)