Algebra Examples

$f (x) = \sqrt{x + 4}$

Step 1

Substitute $- 2$ for $x$ and find the result for $y$ .

$y = \sqrt{(- 2) + 4}$

Step 2

Add $- 2$ and $4$ .

$y = \sqrt{2}$

Step 3

Substitute $- 1$ for $x$ and find the result for $y$ .

$y = \sqrt{(- 1) + 4}$

Step 4

Add $- 1$ and $4$ .

$y = \sqrt{3}$

Step 5

Substitute $0$ for $x$ and find the result for $y$ .

$y = \sqrt{(0) + 4}$

Step 6

Simplify $\sqrt{(0) + 4}$ .

Tap for more steps...

Step 6.1

Add $0$ and $4$ .

$y = \sqrt{4}$

Step 6.2

Rewrite $4$ as $2^{2}$ .

$y = \sqrt{2^{2}}$

Step 6.3

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

$y = 2$

Step 7

Substitute $1$ for $x$ and find the result for $y$ .

$y = \sqrt{(1) + 4}$

Step 8

Add $1$ and $4$ .

$y = \sqrt{5}$

Step 9

Substitute $2$ for $x$ and find the result for $y$ .

$y = \sqrt{(2) + 4}$

Step 10

Add $2$ and $4$ .

$y = \sqrt{6}$

Step 11

This is a table of possible values to use when graphing the equation.

$\begin{array}{c} x & y \\ - 2 & \sqrt{2} \\ - 1 & \sqrt{3} \\ 0 & 2 \\ 1 & \sqrt{5} \\ 2 & \sqrt{6} \end{array}$

Step 12