2 2 3 x 4 5 12 July 8, 2019 16 32 64 128 1 2 x 3 4 )= 5 12 2 2x x 4 )+ 5 x 2 12 3 2 12 x 3 5 4 6 x 9 2 2 3x 3 12 4 5 7 x 2 2 left(x+ frac 3 4 right)^2-5=123 2 + 3 + 4 + 5 + 6 2 x 2 5