Question

упростите выражение
-0,4а(2а^2+3)(5-3а^2)

Answer 1

$- 0.4a(2 {a}^{2} + 3)(5 - 3 {a}^{2}) = - 0.8 {a}^{3} - 1.2a(5 - 3 {a}^{2} ) = - 0.8 {a}^{3} - 6a + 3.6 {a}^{3} = 2.8 {a}^{3} - 6a$