Question

(0,4х^6-5) (5х^3+2)-х^3(2х^6+0,8х^3-25)

Answer 1

$(0,4x^6-5)(5x^3+2)-x^3*(2x^6+0,8x^3-25)=2x^9+0,8x^6-25x^3-$$10-2x^9-0,8x^6+25x^3=-10$