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  4. If a+b=3 and a b=2, then find a3+b3.

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Q. If $a+b=3$ and $a b=2$, then find $a^3+b^3$.

Polynomials, LCM and HCF of Polynomials

Solution:

Use $a^3+b^3=(a+b)^3-3 a b(a+b)$ to find $a^3+b^3$.