Precalculus Examples

$\sqrt{2 x} + y = 5$

Step 1

Subtract $\sqrt{2 x}$ from both sides of the equation.

$y = 5 - \sqrt{2 x}$

Step 2

To rewrite as a function of $x$ , write the equation so that $y$ is by itself on one side of the equal sign and an expression involving only $x$ is on the other side.

$f (x) = 5 - \sqrt{2 x}$