If a 3- b 3-243 and a - b -9- then the value of a 2- ab - b 2 isA- 9B- 27C- 18D- 36

The correct option is B 27Using the identity (a^3+b^3) = (a+b)(a^2 ab+b^2), ⇒ 243 = 9(a^2 ab+b^2) ⇒ (a^2 ab+b^2) = 243/9 = 27. ...

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Expansion of (a+b)^3

If a 3+ b 3=2...

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$If (a^{3} + b^{3}) = 243 and (a + b) = 9, then the value of (a^{2} - a b + b^{2}) is$

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