A = ( 6492 + 13 . 1802 )2 - 13 . ( 2 . 649 . 180)2 A == B = 3 . 35−3 4...
Bài 1 :
Tính :
A = ( 649
2
+ 13 . 180
2
)
2
- 13 . ( 2 . 649 . 180)
2
A =
=
B = 3 .
3
5−3
4 −3
2−3
20+3
25B =
182 54C =
3
3
3
3
3
63
2+126200 −2
2
2
2
3
5−3
4 −3
2−3
20+3
253
3
3
3
3
63
2+126200 −