if (2a+b) = 12 and ab is 15 then find the value of 8a^3 + b^3
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11
Answer:
(2a)
3
+b
3
=(2a+b)[(2a)
2
+b
2
−2ab]
=(2a+b)[(2a+b)
2
−6ab]=12×54=
648
Answered by
2
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