2x2 2 2 x 1 0 July 8, 2019 16 32 64 128 2x2 2 √ 2x 1 0 X 1 )( x 2 2 x 4 )- 2x2 0 2x2 2 root 2 x 1 0 2x2 k 2 x 1 0 2x2 2 √ 2x 1 0 by quadratic formula