1)y=0
0,5x^2-3=0
0.5x^2=3
x^2=6
x=√6
(√6;0)
2)y=0
0.5(x+2)^2=0
0.5(x²+4x+4)=0
0.5x²+2x+2=0
D=b²-4ac=2²-4×0.5×2=4-4=0, D=0
x=-b/2a=-2/1=-2, x=-2
(-2;0)
3)y=0
-0.5(x-3)²+2=0
-0.5(x²-6x+9)+2=0
-0.5x²+3x-4.5+2=0
0.5x²-3x+2.5=0
D=b²-4ac=9-5=4 D>0
x1=-b-√D/2a=-3-2/1=-5
x2=-b+√D/2a=-3+2/1=-1
(-5;0) и (-1;0)
4)y=0
0.5(x²+4x+4)=0
0.5x²+2x+2=0
D=b²-4ac=4-4=0, D=0
x=-b/2a=-2/1=-2
(-2;0)
вроде так :)