SOLUTION: I need to find the sum of: x3 minus 3x2y plus 3xy2, minus 2x2y minus xy2 minus y3 and x3 plus 4y3 this is what I think x3 plus x3 minus 3x2y minus 2x2y 3xy2 minus xy2 minus y

Question 68909: I need to find the sum of:
x3 minus 3x2y plus 3xy2, minus 2x2y minus xy2 minus y3 and x3 plus 4y3
this is what I think
x3 plus x3
minus 3x2y minus 2x2y
3xy2 minus xy2
minus y3 plus 4y3
this would give me
2x3 minus 5x2y plus 2xy2 plus 3y3
is this correct
(from worksheet from cambridge mathematics 3 unit year 11)
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Here's my answer!

It matches yours exactly...congratulations!
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