Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1 <= x^2+4*x+9-12*x <= 9 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        1 <= x ^ 2 + 4 * x + 9 - 12 * x         (1)
         x ^ 2 + 4 * x + 9 - 12 * x <= 9         (2)

---

    From inequality(1)：
         x ≤ 1.171573 或  x ≥ 6.828427
    From inequality(2)：
         0 ≤ x ≤ 8

---

    From inequalities (1) and (2)
         0 ≤ x ≤ 1.171573 或  6.828427 ≤ x ≤ 8    (3)

---

    The final solution set is :
         0 ≤ x ≤ 1.171573 或  6.828427 ≤ x ≤ 8

Your problem has not been solved here? Please take a look at the  hot problems ！