# Question #c738b

Jan 28, 2018

$x = 4$

#### Explanation:

Let the number $= x$

Given in the question, we have the expression ${x}^{2}$ and the expression $4 x$

From the question we know that ${x}^{2} = 4 x$

Now we solve like a normal quadratic:

First we factorise

${x}^{2} - 4 x = 0$
$x \left(x - 4\right) = 0$

Now we solve:
$x = 0 , x = 4$

We know that $x$ can't be $0$ as ${0}^{2}$ isn't $= 4 \cdot 0$

$\therefore x = 4$

We can check as ${4}^{2} = 4 \cdot 4$