Simplify 4x^2-(8x-4x^2)+5+(4x-10)

$4 x^{2} - (8 x - 4 x^{2}) + 5 + (4 x - 10)$

Remove parentheses.

$4 x^{2} - (8 x - 4 x^{2}) + 5 + 4 x - 10$

Simplify each term.

Apply the distributive property.

$4 x^{2} - (8 x) - (- 4 x^{2}) + 5 + 4 x - 10$

Multiply $8$ by $- 1$ .

$4 x^{2} - 8 x - (- 4 x^{2}) + 5 + 4 x - 10$

Multiply $- 4$ by $- 1$ .

$4 x^{2} - 8 x + 4 x^{2} + 5 + 4 x - 10$

$4 x^{2} - 8 x + 4 x^{2} + 5 + 4 x - 10$

Simplify by adding terms.

Add $4 x^{2}$ and $4 x^{2}$ .

$8 x^{2} - 8 x + 5 + 4 x - 10$

Add $- 8 x$ and $4 x$ .

$8 x^{2} - 4 x + 5 - 10$

Subtract $10$ from $5$ .

$8 x^{2} - 4 x - 5$

$8 x^{2} - 4 x - 5$

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