Write in Standard Form 8x^2-5+7x^4-9x-x^5

$8 x^{2} - 5 + 7 x^{4} - 9 x - x^{5}$

To write a polynomial in standard form, simplify and then arrange the terms in descending order.

$a x^{2} + b x + c$

Move $- 5$ .

$8 x^{2} + 7 x^{4} - 9 x - x^{5} - 5$

Move $- 9 x$ .

$8 x^{2} + 7 x^{4} - x^{5} - 9 x - 5$

Move $8 x^{2}$ .

$7 x^{4} - x^{5} + 8 x^{2} - 9 x - 5$

Reorder $7 x^{4}$ and $- x^{5}$ .

$- x^{5} + 7 x^{4} + 8 x^{2} - 9 x - 5$