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JAMB - Mathematics (1978 - No. 32)
The quantity (x + y) is a factor of
x
2
+ y
2
x
3
- y
3
2x
2
- 3xy + y
2
- x + 1
2x
3
+ 2x
2
y - xy + 3x - y
2
+ 3y
x
5
- y
5
Explanation
(x + y) is a factor 2x
3
+ 2x
2
y - xy + 3x - y^2
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