# How do you solve #x^2 - 361 = 0#?

##### 1 Answer

May 19, 2016

#### Answer:

Solution as the primary root is

#### Explanation:

Add

But -361+361=0

Square root both sides

As 361 is in the hundreds then the root involves 10 as 10^2=100 so the root is something like

The last digit of 361 is 1 and

There is something called the primary root which is always positive

Solution as the primary root is