If (2a + b) = 12 and ab = 15, then find thevalue of 8a³+b³.
Answer:
(2a)
3
+b
=(2a+b)[(2a)
2
−2ab]
=(2a+b)[(2a+b)
−6ab]=12×54=
648
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Answer:
(2a)
3
+b
3
=(2a+b)[(2a)
2
+b
2
−2ab]
=(2a+b)[(2a+b)
2
−6ab]=12×54=
648