Write in Standard Form (x^2-2x-80)-(x-10)

$(x^{2} - 2 x - 80) - (x - 10)$

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.

$x^{2} - 2 x - 80 - x - - 10$

Multiply $- 1$ by $- 10$ .

$x^{2} - 2 x - 80 - x + 10$

Simplify by adding terms.

Subtract $x$ from $- 2 x$ .

$x^{2} - 3 x - 80 + 10$

Add $- 80$ and $10$ .

$x^{2} - 3 x - 70$