Question

Решите
1) x²=3x
2) х²+2х-3=2х+6
3) 3х²+7=2х+7

Answer 1

1) x^2-3x=0
x(x-3)=0
x=0; x=3

2) x^2+2x-3-2x-6=0
x^2-9=0
x^2=9
x=3; x=-3

3)3x^2+7-2x-7=0
3x^2-2x=0
x(3x-2)=0
x=0; x=2/3