1 2x 12 ) ( 1 8x 3 July 8, 2019 16 32 64 128 1 2x 12 )+( 1 8x 3 8x 9 2x 12 1 3x 1 4 1 2x 3x 1 3 8x 12 1 + 12 + 2 + 3 12 ×1=12 2^x + 8^x = 130 1 + 12 2 + 23
