Question

выполните действия 8(х^4-2х^3-1)-3(х^4-5х^3+2)-х^3(5х-1)

Answer 1

$8(x^{4} -2x^{3} -1)-3( x^{4} -5 x^{3} +2)- x^{3} ( 5x-1)=$
$8 x^{4} -16 x^{3} -8-3 x^{4} +15 x^{3} -6-5 x^{4} + x^{3} =0+0-14=-14$