X 4 2x 3 8x 2 12x 16 July 8, 2019 16 32 64 128 Factor x 4 2x 3 8x 2 12x 16 (12 - 2 4x)/8 = (3 8x - 19)/4 (x ^ 2 - 16)/(8x ^ 3) * (4x)/(x + 4) 2^x + 8^x = 130
