Question

x(x-y)的平方分之y与（y-x）的立方分之x通分,

Answer 1

y/x(x-y)²;x/(y-x)³;

∴分母公因式为x(y-x)3;

∴y/x(x-y)²=y(y-x)/x(y-x)³;x/(y-x)³=x²/x(y-x)³;