# How do you solve #sqrta+11=21# and check your solution?

##### 2 Answers

Apr 18, 2017

#### Explanation:

Subtract

Square both sides

To check the solution substitute this value (

So the solution is correct

Apr 18, 2017

The answer is

#### Explanation:

To get "a" by itself you want to subtract 11 from both sides:

So now the equation is:

Since you want to get "a" by itself, you want to now square both sides of the equation to get rid of the square root:

This is equal to:

If you have any questions, feel free to comment!