Question

if (2a+b) = 12 and ab is 15 then find the value of 8a^3 + b^3​

Answer 1

Answer:

(2a)

3

+b

3

=(2a+b)[(2a)

2

+b

2

−2ab]

=(2a+b)[(2a+b)

2

−6ab]=12×54=

648

Answer 2

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