3-12x^2=0 решите уравнение
12x^2=3 x^2=1/4 x1=1/2; x2=-1/2
3-12x^2=0 -12x^2=-3 12x^2=3 x^2=3/12 x^2=1/4 x=1/2
x2=-(1/2)