if a+b+c=9 and a2+b2+c2=35, find the value o a3+b3+c3-3abc
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Just one (a+b+c)^2 = 81 using the formula and substitute the value
And (a3+b3+c3-3abc)=(a+b+c)(a^2+b^2+c^2-ab-bc-ca)
And get the answer
And (a3+b3+c3-3abc)=(a+b+c)(a^2+b^2+c^2-ab-bc-ca)
And get the answer
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