Evaluate (x^2-8x-6)-(x^2-2x)

$(x^{2} - 8 x - 6) - (x^{2} - 2 x)$

Simplify each term.

Apply the distributive property.

$x^{2} - 8 x - 6 - x^{2} - (- 2 x)$

Multiply $- 2$ by $- 1$ .

$x^{2} - 8 x - 6 - x^{2} + 2 x$

Simplify by adding terms.

Combine the opposite terms in $x^{2} - 8 x - 6 - x^{2} + 2 x$ .

Subtract $x^{2}$ from $x^{2}$ .

$- 8 x - 6 + 0 + 2 x$

Add $- 8 x - 6$ and $0$ .

$- 8 x - 6 + 2 x$

Add $- 8 x$ and $2 x$ .

$- 6 x - 6$