Factorize :
8b^3-1/8b^3-3(2b-1/2b)+27
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Answer:
Step-by-step explanation:It's simple
4b^2 + 1/b^2= 2 (given)
(2b+1/b)^2= 4b^2 + 1/b^2 + 4
(a+b)^2= a^2 + b^2 +2ab
(2b^+1/b)^2 = 6
(2b+1/b)= -√6,√6
(a+b)^3 = a^3 + b^3 +3ab(a+b)
(2b + 1/b)^3 = 8b^3 + 1/b^3 + 6(2b+1/b)
Put value of (2b+1/b)= +√6
√6^3 = 8b^3 + 1/b^3 + 6(√6)
6√6= 8b^3 + 1/b^3 + 6√6
(8b^3 + 1/b^3) = 0
If you take value of (2b+1/b) as -√6
-6√6= 8b^3+1/b^3-6√6
(8b^3+1/b^3) = 0
In both the cases answer is 0
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