因为(m^2+n^2)^2=m^4+2m^2n^2+n^4,
(m^2-n^2)^2=m^4-2m^2n^2+m^4,
(2mn)^2=4m^2n^2,
m^4+2m^2n^2+n^4=(m^4-2m^n^2+m^4)+4m^2n^2
所以为直角三角形
m方+N方,2MN,m方—N方,判断三角形ABC的形状
m方+N方,2MN,m方—N方,判断三角形ABC的形状
物理人气：625 ℃时间：2020-03-17 12:20:36
优质解答
我来回答
类似推荐
猜你喜欢
- 121 28 33 42 43 60 ( )找规律,括号里填什么?此数小于100
- 2在函数y=-3x的图象上取一点P，过P点作PA垂直x轴，已知P点的横坐标为-2，则三角形POA的面积（O为坐标原点）为_．
- 3自由女神像的英文单词!
- 4(100-1456/26)*78这道题简便运算怎么做?
- 5attention 是难题!
- 61.He found _____ very difficult to understand what the foreigner said.
- 7小学五年级《快乐寒假》里16面的《雕凤凰》阅读题答案
- 8jane often goes to work on foot but she takes a bus to work
- 9如果其中一个因数扩大2倍,另一个因数不变,则积是多少?
- 10Let is go to the movies instead __watching tv at home.