Simplify 2(d^2-9d-5)+(d^2-9)

$2 (d^{2} - 9 d - 5) + (d^{2} - 9)$

Remove parentheses.

$2 (d^{2} - 9 d - 5) + d^{2} - 9$

Simplify each term.

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Apply the distributive property.

$2 d^{2} + 2 (- 9 d) + 2 \cdot - 5 + d^{2} - 9$

Simplify.

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Multiply $- 9$ by $2$ .

$2 d^{2} - 18 d + 2 \cdot - 5 + d^{2} - 9$

Multiply $2$ by $- 5$ .

$2 d^{2} - 18 d - 10 + d^{2} - 9$

Simplify by adding terms.

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Add $2 d^{2}$ and $d^{2}$ .

$3 d^{2} - 18 d - 10 - 9$

Subtract $9$ from $- 10$ .

$3 d^{2} - 18 d - 19$

Simplify 2(d^2-9d-5)+(d^2-9)

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