Question

выполните действие
3(4-5xy)(4+5xy)
(x²-y³)²
(c+m)²-(c-m)²

Answer 1

1)) 3(4-5xy)(4+5xy)
3(16+20xy-20xy-25xy)
3(16-25xy)
48-75xy

2)x(в 4-ом степени) - 2x²y³+y(в 6-ом степени)
3)c²+2cm-m²-(c²-2cm+m²)
c²+2cm+m²-c²+2cm-m²
4cm