A. X3 - Y3 = (X - Y)(X2 - XY + Y2) B. X3 - Y3 = (X - Y)(X2 + XY + Y2)...
Câu 3:
A. x
3
- y
3
= (x - y)(x
2
- xy + y
2
)
B. x
3
- y
3
= (x - y)(x
2
+ xy + y
2
)
C. x
3
- y
3
= (x - y)(x
2
- 2xy + y
2
)
D. x
3
- y
3
= (x - y)
3
Câu 3:
A. x
3
- y
3
= (x - y)(x
2
- xy + y
2
)
B. x
3
- y
3
= (x - y)(x
2
+ xy + y
2
)
C. x
3
- y
3
= (x - y)(x
2
- 2xy + y
2
)
D. x
3
- y
3
= (x - y)
3