x^2= -3x+4
x^2+3x-4=0
D=9+4*4=25=5^2
x1=(-3+5)/(2)=1
x2=(-3-5)/(2)=-4
x^2=-3x+4
По т. Виета:
x1+x2=-3|x1=-4
x1*x2=-4|x2=1
x=-4;1
x^2= -3x+4
x^2+3x-4=0
D=9+4*4=25=5^2
x1=(-3+5)/(2)=1
x2=(-3-5)/(2)=-4
x^2=-3x+4
x^2+3x-4=0
По т. Виета:
x1+x2=-3|x1=-4
x1*x2=-4|x2=1
x=-4;1