Tìm x 25 2x 3 5 3 2 4 2 July 8, 2019 16 32 64 128 35.13) 2) x ^ 2 - (9 - x) ^ 2 - 2x 4) x ^ 2 (25 - x) ^ 2 + 25x (25 ^ x - 4 * 5 ^ x) ^ 2 + 8 * 5 ^ x 2 * 25 ^ x + 15
