Simplify (-9n+9+6n^4)-(-6n-7n^4)

$(- 9 n + 9 + 6 n^{4}) - (- 6 n - 7 n^{4})$

Step 1

Simplify each term.

Apply the distributive property.

$- 9 n + 9 + 6 n^{4} - (- 6 n) - (- 7 n^{4})$

Multiply $- 6$ by $- 1$ .

$- 9 n + 9 + 6 n^{4} + 6 n - (- 7 n^{4})$

Multiply $- 7$ by $- 1$ .

$- 9 n + 9 + 6 n^{4} + 6 n + 7 n^{4}$

$- 9 n + 9 + 6 n^{4} + 6 n + 7 n^{4}$

Step 2

Simplify by adding terms.

Add $- 9 n$ and $6 n$ .

$- 3 n + 9 + 6 n^{4} + 7 n^{4}$

Add $6 n^{4}$ and $7 n^{4}$ .

$- 3 n + 9 + 13 n^{4}$

Simplify the expression.

Move $9$ .

$- 3 n + 13 n^{4} + 9$

Reorder $- 3 n$ and $13 n^{4}$ .

$13 n^{4} - 3 n + 9$

$13 n^{4} - 3 n + 9$

$13 n^{4} - 3 n + 9$

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