# How do you solve x^2-4x=0 ?

Apr 11, 2016

$x = 0$ or 4

#### Explanation:

If we take $x$ out as a common factor, we get:

$x \left(x - 4\right) = 0$

Using the null factor law we can now solve for $x$(essentially determining the values required to make each value of $x = 0$):

$x = 0$
or $x = 4$.