SOLUTION: Find the Value of: a^3 + 8b^3 if a + 2b = 10 and ab= 15 Hint: (a+2b)^3 = a^3 + 8b^3 + 6ab(a+2b) = a^3+8b^3 = (a+2b)^3

SOLUTION: Find the Value of: a^3 + 8b^3 if a + 2b = 10 and ab= 15 Hint: (a+2b)^3 = a^3 + 8b^3 + 6ab(a+2b) = a^3+8b^3 = (a+2b)^3 - 6ab(a+2b)

Question 1092355: Find the Value of:
a^3 + 8b^3 if a + 2b = 10 and ab= 15
Hint: (a+2b)^3 = a^3 + 8b^3 + 6ab(a+2b)
= a^3+8b^3 = (a+2b)^3 - 6ab(a+2b)

Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

Use the hint they gave you.... If
then the expression you are to evaluate is

You are given the values of both (a+2b) and (ab) -- plug them into that equation and evaluate.
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