2x^2+x-3=0D=1^2-4*2*(-3)=25x1=-1+5/4=1x2=-1-5/4=-6/4=-3/2=-1.5x^3=x^2-7x+7=0x^3-x^2-7x+7=0x(x^2-7)-(x^2-7)=0(x^2-7)(x-1)=0x=√ 7x=-√ 7x=1
2x^2+x-3=0
D=1^2-4*2*(-3)=25
x1=-1+5/4=1
x2=-1-5/4=-6/4=-3/2=-1.5
x^3=x^2-7x+7=0
x^3-x^2-7x+7=0
x(x^2-7)-(x^2-7)=0
(x^2-7)(x-1)=0
x=√ 7
x=-√ 7
x=1