quadratic root

例句：

1. 1.The quadratic root of a quadratic equation is the square root of the coefficients of the equation.
   一个二次方程的二次根数是方程系数的平方根。
2. 2. The quadratic root of x^2 - 4 = 0 is 2.
   x^2 - 4 = 0的二次根数是2。
3. 3. The quadratic root of a quadratic equation can be found by taking the square root of both sides of the equation.
   一个二次方程的二次根数可以通过取方程两边平方根来找到。