решите уравнения
а) x²-5x=0
b)x²+7x+12=0
c)[tex] \frac{ x^{2}+9 }{x} [/tex]=2x
а) x²-5x=0
b)x²+7x+12=0
c)[tex] \frac{ x^{2}+9 }{x} [/tex]=2x
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x=0 x-5=0
x=5
ответ x=0 x=5