Simplify 5a+6a^2+7a^0-4a^2-9a

$5 a + 6 a^{2} + 7 a^{0} - 4 a^{2} - 9 a$

Simplify each term.

Anything raised to $0$ is $1$ .

$5 a + 6 a^{2} + 7 \cdot 1 - 4 a^{2} - 9 a$

Multiply $7$ by $1$ .

$5 a + 6 a^{2} + 7 - 4 a^{2} - 9 a$

$5 a + 6 a^{2} + 7 - 4 a^{2} - 9 a$

Simplify by adding terms.

Subtract $9 a$ from $5 a$ .

$6 a^{2} + 7 - 4 a^{2} - 4 a$

Subtract $4 a^{2}$ from $6 a^{2}$ .

$2 a^{2} + 7 - 4 a$

Move $7$ .

$2 a^{2} - 4 a + 7$

$2 a^{2} - 4 a + 7$

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