Question

write the answer in standard form(-3x^4+x^6-9x^5+2x^2-7)-(-2x^5+x-4x^2-x^4+12)

Answer 1

Let's make the operation:

$\begin{gathered} (-3x^4+x^6-9x^5+2x^2-7)-(-2x^5+x-4x^2-x^4+12) \\ =-3x^4+x^6-9x^5+2x^2-7+2x^5-x+4x^2+x^4-12 \\ =x^6-7x^5-2x^4+6x^2-x-19 \end{gathered}$

Therefore the answer is:

$x^6-7x^5-2x^4+6x^2-x-19$