Find the Exact Value 84^2-72+7

$8 \cdot 4^{2} - 7 \cdot 2 + 7$

Step 1

Simplify each term.

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

$8 \cdot 16 - 7 \cdot 2 + 7$

Multiply $8$ by $16$ .

$128 - 7 \cdot 2 + 7$

Multiply $- 7$ by $2$ .

$128 - 14 + 7$

$128 - 14 + 7$

Step 2

Simplify by adding and subtracting.

Subtract $14$ from $128$ .

$114 + 7$

Add $114$ and $7$ .

$121$

$121$

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