2x^2-18=0
2x^2=18
x^2=9
x1=3
x2=-3
3x^2-12=0
3x62=12
x^2=4
x1=2
x2=-2
2x^2=18 x^2=9 x^=3 x^2=12/3 x^2=4 x=2
2x^2-18=0
2x^2=18
x^2=9
x1=3
x2=-3
3x^2-12=0
3x62=12
x^2=4
x1=2
x2=-2
2x^2=18 x^2=9 x^=3 x^2=12/3 x^2=4 x=2