Question

Раскрыть скобки:
1) 3x(x³-4x+6)=?
2) (4a-7b)(5a+6b)=?​

Answer 1

$3x( {x}^{3} - 4x + 6) = 3 {x}^{4} - 12 {x}^{2} + 18x \\ (4a - 7b)(5a + 6b) = 20 {a}^{2} + 24ab - 35ab - 42 {b}^{2}$