If point M is located on segment LN, then using the segment addition postulate, we have:
LN is equal to LM plus MN
LN = 22 + 15
Therefore, LN = 37
To properly complete the square, divide the b value by 2 and then square that result. For instance, if b equals 4, you would first halve it to get 2, and the square of 2 would give a result of 4.
