[latex]X-Y \\ XY- x^{2} [/latex] -[latex]3-Y \\ XY- Y^{2} [/latex]
[latex]X-Y \\ XY- x^{2} [/latex] -[latex]3-Y \\ XY- Y^{2} [/latex]
Гость
Ответ(ы) на вопрос:
Гость[latex] \frac{x-y}{xy-x^2} - \frac{3-y}{xy-y^2} = \frac{x-y}{x(y-x)} - \frac{3-y}{y(x-y)} = \\ \\ \frac{x-y}{x(y-x)} + \frac{3-y}{y(y-x)} = \frac{y(x-y)+x(3-y)}{xy(y-x)} = \frac{yx-y^2+3x-xy}{xy(y-x)} = \\ \\ \frac{3x-y^2}{xy(y-x)} [/latex]
Гость(x-y)/(xy-x²) -(3-y)/(xy-y²)=(x-y)/x(y-x)+(3-y)y(y-x)=(xy-y²+3x-xy)/xy(y-x)=
=(3x-y²)/xy(y-x)
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