This is very confusing I need somebody to tell me what this is Thanks! (Not just tell me what it is and answer the question of course)

Place the following steps in order to complete the square and solve the quadratic equation,

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?