3х²-13х+10=0
d=13²-4*3*10=169-120=49
√49=7
x1=(13-7/6)=(6/6)=1
x2=(13+7/6)=(10/3)
5x²-16x+3=0
d=16²-4*5*3=256-60=196
√196=14
x1=(16+14/10)=(30/10)=3
x2=(16-14/10)=(2/10)=(1/5)
4x²-12x=0
4x(x-3)=0
x(x-3)=0
x=0
x=3
2x²+17x=0
x(2x+17)=0
2x+17=0
x=0
x=-(17/2)
x²-3721=0
x²=3721
x=-61
x=61