X 4 9x 2 36 0 July 8, 2019 16 32 64 128 X 6 4x 4 9x 2 36 0 X mũ 3 trừ 4 x mũ 2 9x 36 0 (x ^ 2 + 4x - 4) ^ 2 - 9x ^ 2 - 36x + 44 = 0
