3 11x 7 โ x 42x 21 July 8, 2019 16 32 64 128 - 11 x 7 + 42 1) (x - 7) ^ 3 + 42x ^ 2 = (x + 7) ^ 3 + 14 - 7x 2) (6 + x) ^ 3 - 220x = 2x ^ 3 - (x - 6) ^ 3 + 19 โ 11 ยท 7 + 42
