# Question #7a744

##### 1 Answer

Please see the explanation for steps leading to the answer,

#### Explanation:

Because the argument of a square root cannot be negative add the restriction

Add

Square both sides:

Squaring "undoes" the radicals on the left and use the pattern #(a + b)^2 = a^2 + 2ab + b^2 on the right:

Remove the squared radical on the right:

Combine like terms:

Divide both sides by 2:

Square both sides:

Check

This checks.