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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -（x^2）+2x+3 ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -( x ^ 2 ) + 2 * x + 3 ≥0         (1)

---

    From inequality(1)：
         -1 ≤ x ≤ 3

---

    The final solution set is :
         -1 ≤ x ≤ 3

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