Frac 1 2 sqrt 20 x =5 July 8, 2019 16 32 64 128 Frac 1 2 sqrt 20 x = 5 Frac x 2 +5 1 Frac 1+ sqrt 5 2 2 1+ 5 Frac 5 8 cdot frac 2 5 8 5 ⋅ 5 2