Question

помогите вычеслить: 5x²-5y²/x²+y² • 3x²/10x-10y пожалуйста ​

Answer 1

$\frac{5 {x}^{2} - 5 {y}^{2} }{ {x}^{2} + {y}^{2} } \times \frac{3 {x}^{2} }{10x - 10y} = \frac{5(x - y)(x + y)}{ {x}^{2} + {y}^{2} } \times \frac{3 {x}^{2} }{10(x - y) } =$

$= \frac{x + y}{ {x}^{2} + {y}^{2} } \times \frac{3 {x}^{2} }{2} = \frac{3 {x}^{3} + 3 {x}^{2}y }{2 {x}^{2} + 2 {y}^{2} }$