Question

Решите пожалуйста. ​

Answer 1

$M=\frac{x^3+y^2x+x^2y+y^3}{x^4y+xy^4}=\frac{\left ( x+y \right )\left ( x^2+y^2 \right )}{xy\left ( x^3+y^3 \right )}=\frac{x^2+y^2}{xy\left ( x^2-xy+y^2 \right )}=\frac{\left ( x+y \right )^2-2xy}{xy\left ( \left ( x+y \right )^2-3xy \right )}\\M=\frac{\left ( -7 \right )^2-2\cdot 5}{5\left ( \left ( -7 \right )^2-3\cdot 5 \right )}=\frac{39}{170}$

Answer 2

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