用配方法解方程2x2+3=7x时，方程可变形为_刷题宝

题干

用配方法解方程2x²+3=7x时，方程可变形为（）

A：（x﹣ $\frac{7}{2}$ ）²= $\frac{37}{4}$

B：（x﹣ $\frac{7}{2}$ ）²= $\frac{43}{4}$

C：（x﹣ $\frac{7}{4}$ ）²= $\frac{1}{16}$

D：（x﹣ $\frac{7}{4}$ ）²= $\frac{25}{16}$

上一题下一题 0.0难度选择题更新时间:2018-11-22 09:01:37

答案(点此获取答案解析）

D

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