Calculus Examples

$\sqrt{81 - {(9)}^{2}}$

Step 1

Raise $9$ to the power of $2$ .

$\sqrt{81 - 1 \cdot 81}$

Step 2

Multiply $- 1$ by $81$ .

$\sqrt{81 - 81}$

Step 3

Subtract $81$ from $81$ .

$\sqrt{0}$

Step 4

Rewrite $0$ as $0^{2}$ .

$\sqrt{0^{2}}$

Step 5

Pull terms out from under the radical, assuming positive real numbers.

$0$