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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x1^2+x2^2+14*x3^2+7*x4^2+6*x1*x3+4*x1*x4-4*x2*x3+2*x2*x4 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x * 1 ^ 2 + x * 2 ^ 2 + 14 * x * 3 ^ 2 + 7 * x * 4 ^ 2 + 6 * x * 1 * x * 3 + 4 * x * 1 * x * 4 - 4 * x * 2 * x * 3 + 2 * x * 2 * x * 4 <0         (1)

---

    From inequality(1)：
         -9.346154 < x < 0

---

    The final solution set is :
         -9.346154 < x < 0

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