SOLUTION: Simplify (5y^3-8y^2-32y+21)/(y^2-y-7)

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Question 3435: Simplify
(5y^3-8y^2-32y+21)/(y^2-y-7)
Answer by drglass(89) About Me  (Show Source):
You can put this solution on YOUR website!
The average of three numbers is the sum of the numbers divided by 3. Let the numbers be X, Y and Z, then

%28X+%2B+Y+%2B+Z%29%2F3+=+V.

multiply both sides by 3 to get X+%2B+Y+%2B+Z+=+3V.

subtract Y and Z from both sides to get X+=+3V+-+Y+-+Z

The remaining number X is 3V- Y - Z