Write in Standard Form (9x^2-5x)-(-3x-8)

$(9 x^{2} - 5 x) - (- 3 x - 8)$

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

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

Simplify each term.

Apply the distributive property.

$9 x^{2} - 5 x - (- 3 x) - - 8$

Multiply $- 3$ by $- 1$ .

$9 x^{2} - 5 x + 3 x - - 8$

Multiply $- 1$ by $- 8$ .

$9 x^{2} - 5 x + 3 x + 8$

Add $- 5 x$ and $3 x$ .

$9 x^{2} - 2 x + 8$