1) х+3х+4 = 0
4х+4=0
4х=-4
х=-1
2) 3х²+2х-2 = 3х.
3х²+2х-2 - 3х= 0
3х²-х-2= 0
D= (-1)²+4•3•2= 1+24=25
√D= √25=5
x12= 1±5/6
x1= 1+5/6 = 6/6=1
x2= 1-5/6 =-4/6 =-2/3
1) х+3х+4 = 0
4х+4=0
4х=-4
х=-1
2) 3х²+2х-2 = 3х.
3х²+2х-2 - 3х= 0
3х²-х-2= 0
D= (-1)²+4•3•2= 1+24=25
√D= √25=5
x12= 1±5/6
x1= 1+5/6 = 6/6=1
x2= 1-5/6 =-4/6 =-2/3