Ответ:
1)y=x²+2x
x²+2x=0
x(x+2)=0
x=0. x=-2
2)y=x-3
x-3=0
x=3
3)y=x²-x
x²-x=0
x(x-1)=0
x=0 x=1
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Ответ:
1)y=x²+2x
x²+2x=0
x(x+2)=0
x=0. x=-2
2)y=x-3
x-3=0
x=3
3)y=x²-x
x²-x=0
x(x-1)=0
x=0 x=1