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由一元二次方程的求根公式可知,当一元二次方程的判别式大于0时,对应的一元二次方程有两个不相等的实数根.实际问题中的一元二次方程往往也有两个不相等的实数根,这两个根虽然都是一元二次方程的根,却不一定都符合问题的实际意义.因此我们在解决与一元二次方程有关的实际问题时,一定要注意对所得的根进行正确的取舍,剔除不
From the formula of the quadratic equation of the quadratic equation, we can see that when the discriminant of the quadratic equation is greater than 0, the corresponding quadratic equation has two real roots that are not equal to each other. There are often two quadratic equations in the real problem Not equal to the real number of roots, both of which are roots of the quadratic equation, but not necessarily in line with the practical significance of the problem.So when we solve the practical problems associated with the quadratic equation, we must pay attention to the income The correct choice of roots, excluding no