2х²-7х+3=0 5Х²-3Х-2=0 2Х²-5Х+3=0 Х²+3Х-1=0

Question

2х²-7х+3=0 5Х²-3Х-2=0 2Х²-5Х+3=0 Х²+3Х-1=0

Answer 1

1) D=49-24=5^2; x1=7+5/4=3 x2=7-5/4=1/2
2) D=25-24=1; x1=5+1/4=3/2 x2=5-1/4=1
3)D=9+40=7^2; x1=9+7/10=1,6 x2=9-7/10=1/5
4)D=9+4=корень из 13