Ответ:
Объяснение:
7х^2 + 3x = 0
x(7x+3)=0
x=0
7x+3=0
7x= -3
x= -3/7
x^2 - 13x = 0
x(x-13)=0
x-13=0
x=13
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Ответ:
Объяснение:
7х^2 + 3x = 0
x(7x+3)=0
x=0
7x+3=0
7x= -3
x= -3/7
x^2 - 13x = 0
x(x-13)=0
x=0
x-13=0
x=13