Question

Упростите фастом

-5a²(-4a-5ay)=
4c^4 (x³c-10-7c+2c^4) =
-3y^4(-2ay+2y+3b)=

Answer 1

$1) - 5 {a}^{2} ( - 4a - 5ay) = 20 {a}^{3} + 25 {a}^{3} y \\ 2)4 {c}^{4}( {x}^{3} c - 10 - 7c + 2 {c}^{4} ) = 4 {c}^{5} {x}^{3} - 40 {c}^{4} - 28 {c}^{5} + 8 {c}^{8} \\ 3) - 3 {y}^{4} ( - 2ay + 2y + 3b) = 6a {y}^{5} - 6 {y}^{5} - 9 {y}^{4} b$