3x^2=0 x=0
(x+1)(x-1)=0 x1=-1 x2=1
4x^2-1=0 x^2=1/4 x1=-1/2 x2=1/2
3x^2=5 x^2=5/3 x1=-V5/3 x2=V5/3
4x^2-4x+1=0 (2x-1)^2=0 2x-1=0 x=1/2
x^2-16x-17=0 x1=17 x2=-1
0,3x^2+5x=0 x(0.3x+5)=0 x1=0 x2=-5/0.3=-50/3
x^2-4x+5=0 D=16-20=-4<0 нет решений
3x^2=0 x=0
(x+1)(x-1)=0 x1=-1 x2=1
4x^2-1=0 x^2=1/4 x1=-1/2 x2=1/2
3x^2=5 x^2=5/3 x1=-V5/3 x2=V5/3
4x^2-4x+1=0 (2x-1)^2=0 2x-1=0 x=1/2
x^2-16x-17=0 x1=17 x2=-1
0,3x^2+5x=0 x(0.3x+5)=0 x1=0 x2=-5/0.3=-50/3
x^2-4x+5=0 D=16-20=-4<0 нет решений