а)
Х^2-7х=0
Х(Х-7)=0
Х=0 или Х-7=0
Х=7
1) x(x-7)=0
x=0 x=7
2) 3x^2=0 |:3
x^2=0
x=0
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Answers & Comments
а)
Х^2-7х=0
Х(Х-7)=0
Х=0 или Х-7=0
Х=7
б)3х^2=0х^2=0х=01) x(x-7)=0
x=0 x=7
2) 3x^2=0 |:3
x^2=0
x=0