Evaluate 12^2+9-4^2

$12^{2} + 9 - 4^{2}$

Step 1

Simplify each term.

Raise $12$ to the power of $2$ .

$144 + 9 - 4^{2}$

Raise $4$ to the power of $2$ .

$144 + 9 - 1 \cdot 16$

Multiply $- 1$ by $16$ .

$144 + 9 - 16$

$144 + 9 - 16$

Step 2

Simplify by adding and subtracting.

Add $144$ and $9$ .

$153 - 16$

Subtract $16$ from $153$ .

$137$

$137$

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