Question

 Выполните действия
(1,5x^2-x)*3x-x^2(9x-3)
8(x^4-2x^3-1_-3(x^4-5x^3+2)-x^3(5x-1)
(0,4^6-5)(5x^3+2)-x^3(2x^6+0,8x^3-25)

Answer 1

$4,5 x^3 -3x^2 - 9x^3 +3x^2 =-4,5x^3 \ \ 8x^4 -16x^3-8-3x^4 +15x^3 -6-5x^4 +x^3=-14 \ \ 2x^9+0,8x^6 -25x^3-10- 2x^9-0,8x^6+25x^3=-10$