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一、利用根的代换求作一元二次方程例1已知方程x~2-3x+2=0,不解方程,求作一个一元二次方程,使它的根分别是已知方程的各根的倒数.
First, the use of root substitution for a quadratic equation Example 1 Known equations x ~ 2-3x +2 = 0, do not solve the equation, for a quadratic equation, so that its roots are known equations The countdown of each root.