Question

x(x² - y²) + y(xy-y²);​

Answer 1

Ответ:

x(x² - y²) + y(xy-y²)=х³-ху²+ху²-у³(-ху², ху² скорочуємо)=х³-у³

Answer 2

x(x² - y²) + y(xy-y²)=x³-xy²+xy²-y³=x³-y³

x(x² - y²)=x³-xy²

y(xy-y²)=xy²-y³