X 2 15x 8 0 July 8, 2019 16 32 64 128 X 3 6x 2 15x 8 0 X 3 15x 2 8 x 11 0 2^x + 8^x = 130 X ^ 2 + 8x + 15 0 X^ 2 +8x+15=0