Respuesta :

-2x^2=-4x.

(-5x^2+4x^3)=(-25x+64x).

-4x(-25x+64x)=100x-256x.

100x-256x=-156x

-156x is your final answer.

- 8[tex]x^{5}[/tex] + 10[tex]x^{4}[/tex]

distribute the parenthesis by - 2x²

= 10[tex]x^{4}[/tex] - 8[tex]x^{5}[/tex]

= - 8[tex]x^{5}[/tex] + 10[tex]x^{4}[/tex] ← in standard form

Note that a polynomial expressed in standard form

The first term is the term with the highest exponent followed by the other terms in descending order of exponents