Ответ:
x(9x+15)+y(25-25y)=x(3x+5)+y(5-5y)
y^3+y^2*x-3yx+9x+27=(y-3)^3
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Ответ:
x(9x+15)+y(25-25y)=x(3x+5)+y(5-5y)
y^3+y^2*x-3yx+9x+27=(y-3)^3