X2−4x+3=2x2+x+3∣−3
x^2 -4x+3-3=2x^2 +x+3-3x2−4x+3−3=2x2+x+3−3
x^2 -4x=2x^2 +xx2−4x=2x2+x
x^2 -4x=2x^2 +x|+4xx2−4x=2x2+x∣+4x
x^2 -4x+4x=2x^2 +x+4xx2−4x+4x=2x2+x+4x
x^2=2x^2+5xx2=2x2+5x
x^2=2x^2+5x|-x^2x2=2x2+5x∣−x2
x^2-x^2=2x^2+5x-x^2x2−x2=2x2+5x−x2
0=2x^2-x^2+5x0=2x2−x2+5x
0=x^2+5x0=x2+5x
x*x+x*5=0x∗x+x∗5=0
x*(x+5)=0x∗(x+5)=0
x=0,or,x+5=0x=0,or,x+5=0
x=0,or,x=-5x=0,or,x=−5
Ответ: 0;-50;−5