X 4 2x 3 6x 2 16x 8 0 July 8, 2019 16 32 64 128 (x ^ 2 - 16)/(8x ^ 3) * (4x)/(x + 4) (x ^ 2 - 4) ^ 2 + (x ^ 2 - 6x - 16) ^ 2 = 0
