-b+√(b2-4ac)/2a -b-√(b2-4ac)/2a 二次根式的加减

分类: 作业答案 • 2022-04-05 11:13:25

问题描述：

答

-b+√(b2-4ac)/2a -b-√(b2-4ac)/2a
=[-b+√(b2-4ac) -b-√(b2-4ac)]/2a
=-2b/2a
=-b/a