求值,-√2.89,±√121/25,0.0196
问题描述：
求值,-√2.89,±√121/25,0.0196
±√（-5）^2+12^2,√41^2-40^2
答
-√2.89=-1.7
±√121/25=±11/5
,√0.0196=0.14
±√（-5）^2+12^2=±13
√41^2-40^2=9