Question

Выполните умножение
1) (2x²-3x+5)*4x²
2) (a²+2ab+4b²)(a-2b)

Answer 1

1)

$8 {x}^{2} - 12 {x}^{3} + 20 {x}^{2} = 28 {x}^{2} - 12 {x}^{3}$

2)

${a}^{3} + 2 {a}^{2} b + 4a {b}^{2} - 2 {a}^{2} b - 4a {b}^{2} - 8 {b}^{3} = {a}^{3} - 8 {b}^{3}$