If a+b=6, find the value of a3+b3+18ab-216
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Answer:
a+b = 6
cubing both sides
we get
a³ + b³ + 3ab(a+b) = 216
a³ + b³ + 3ab(6) = 216
a³ + b³ + 18ab = 216
a³ + b³ + 18ab -216 = 0
thus the required answer is 0
hope this will help you
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