2 4x 7 13 July 8, 2019 16 32 64 128 2 4x 7 )+ 13 91 2 4x 7 )= 13x 5x 14 7 3x 2 )+ 4x 13 4x 13 7 x 2 )+ bx 4x 2 13x 7 4x 2 13x 7 0 2 7 4x 3 )=- 131 Solve for x 2 4x 7 135 4x 2 9x 12 6x 7 130 15 4x 2 7 2x 13 4 3 (- 4x 7 2 13 6x 7 3x 2 4x 13 2x 5 13 12x 3 2 4x )+ 7 4x 2 13x 7 by x 2 4x 13 7 mũ 2