Calculus Examples

$f (7) = \sqrt{64 - x^{2}}$

Step 1

Replace the variable $x$ with $7$ in the expression.

$f (7) = \sqrt{64 - {(7)}^{2}}$

Step 2

Simplify the result.

Tap for more steps...

Step 2.1

Raise $7$ to the power of $2$ .

$f (7) = \sqrt{64 - 1 \cdot 49}$

Step 2.2

Multiply $- 1$ by $49$ .

$f (7) = \sqrt{64 - 49}$

Step 2.3

Subtract $49$ from $64$ .

$f (7) = \sqrt{15}$

Step 2.4

The final answer is $\sqrt{15}$ .

$\sqrt{15}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\sqrt{15}$

Decimal Form:

$3.87298334 \dots$

Step 4