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学过了“一元二次方程”的内容后,数学老师出题给同学们练习.其中的一道题是:设x_1、x_2是方程x~2+x-4=0的两个实
After learning about the contents of the “one-dimensional quadratic equation,” the math teacher asked questions to the students. One of the questions was: Let x_1 and x_2 be the two realities of the equation x~2+x-4=0.