# How do you evaluate sqrt(x+7) when x = 9?

Oct 17, 2015

=color(blue)(4

#### Explanation:

The expression is $\sqrt{x + 7}$, and the value for the variable $x$ given is $9$.

Substituting the same:

sqrt(x+7)= sqrt(color(blue)(9)+7

$= \sqrt{16}$

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

=color(blue)(4