√2½+√2¼-√5=√2+1/2+√2+1/4-√5=2√2+1/2+1/4-√5=2√2+3/4-√5
√2½+√2¼-√5=√(5/2)+√(9/4)-√5=√10/2+3/2-√5=(3+√10)/2-√5
