,

Factor out of .

Rewrite as .

Pull terms out from under the radical.

Use the midpoint formula to find the midpoint of the line segment.

Substitute in the values for and .

Add and .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Divide by .

Factor out of .

Factor out of .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Divide by .

Subtract from .

Find the Midpoint ( square root of 18,2) , ( square root of 2,-2)