X 4 x 2 0 July 8, 2019 16 32 64 128 X 4 x 2 0 solve X 4 4x 2 0 X 4 x 2 1 0 X 4 x 2 1 0 solution X 4 x 2 12 0 X 4 x 2 20 0 X 4 x 2 6 0 X 4 x 2 42 0 X 4 x 2 90 0 X 4 x 2 72 0 4 x 2 x 0 8 X 4 x 2 3 0 X 4 x 2 9 0 X 4 x 2 5 0 2x x 4 )( x 2 )= 0