Question 198165: Find Product:
(X-2Y)^3
I have tried using pascal's triangle. But I am getting confused
Please help!
Thank you very much
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Find Product:
(X-2Y)^3
I have tried using pascal's triangle. But I am getting confused
The 4th level of Pascal gives you 1,3,3,1
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You have a = X and B = (-2Y)
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You get:
1X^3 + 3X^2(-2Y)^1 + 3X^1(-2Y)^2 + 1(-2Y)^3
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= X^3 -6X^2 + 12XY^2 - 8Y^3
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Cheers,
Stan H.
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