SOLUTION: Sir i have tried a few different methods to solve this algebra problem, but im not geeting the right answer my answer is different than the answer in the book please help me.

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Question 385912: Sir i have tried a few different methods to solve this algebra problem, but im not geeting the right answer my answer is different than the answer in the book please help me.
thanks
IF X=5A^3-3B^3, Y=4A^2B-7AB^2+2B^3, Z=4A^3-5A^2+3AB^2, FIND THE VALUE OF
X+2Y+3Z
THANKS AGAIN

Answer by mananth(16949) About Me  (Show Source):
You can put this solution on YOUR website!
IF X=5A^3-3B^3, Y=4A^2B-7AB^2+2B^3, Z=4A^3-5A^2+3AB^2, FIND THE VALUE OF
X+2Y+3Z
...
%285a%5E3-3b%5E3%29%2B2%284a%5E2b-7ab%5E2%2B2b%5E3%29%2B3%284a%5E3-5a%5E2%2B3ab%5E2%29
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%285a%5E3-3b%5E3%2B8a%5E2b-14ab%5E2%2B4b%5E3%2B12a%5E3-15a%5E2%2B9ab%5E2%29
...
5a%5E3%2B12a%5E3-3b%5E3%2B4b%5E3%2B8a%5E2b-14ab%5E2%2B9ab%5E2-15a%5E2
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17a%5E3%2Bb%5E3%2B8a%5E2b-5ab%5E2-15a%5E2
...
m.ananth@hotmail.ca