Evaluate (3x^2+4)-(-5x^2+4x-1)

$(3 x^{2} + 4) - (- 5 x^{2} + 4 x - 1)$

Simplify each term.

Apply the distributive property.

$3 x^{2} + 4 - (- 5 x^{2}) - (4 x) - - 1$

Simplify.

Multiply $- 5$ by $- 1$ .

$3 x^{2} + 4 + 5 x^{2} - (4 x) - - 1$

Multiply $4$ by $- 1$ .

$3 x^{2} + 4 + 5 x^{2} - 4 x - - 1$

Multiply $- 1$ by $- 1$ .

$3 x^{2} + 4 + 5 x^{2} - 4 x + 1$

$3 x^{2} + 4 + 5 x^{2} - 4 x + 1$

$3 x^{2} + 4 + 5 x^{2} - 4 x + 1$

Simplify by adding terms.

Add $3 x^{2}$ and $5 x^{2}$ .

$8 x^{2} + 4 - 4 x + 1$

Add $4$ and $1$ .

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

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

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