２＝１
已知 a = b 則
a
2
= ab
a
2
- b
2
= ab - b
2
( a + b ) ( a - b ) = b ( a - b )
( a + b ) = b
a + a = a
2a = a
2 = 1
到底那邊有問題啊...........大家快來找出答案吧..
要不然幾千年的數學公式就不成立囉
Ñ
答案
H
http://run.to/AndWhose