Find the value of a^3-27b^3 if a-3b =-6, ab = -10
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Answer:
a3 - 27b3=?
a-3b=-6
ab=-10
using (a-b)3=a3-b3-3ab(a-b)
(a-3b)=(a)3-(3b)3-3ab(a-3b)
(-6)3 =(a)3 - (3b)3 - 3(-10)(-6)
a3-27b3 = -216+180
ANSWER =a3-27b3 = -36
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