I'm a complete beginner at these: Could someone please correct me if I'm wrong please (and show me where).... Here goes: (3n+1)^3 = (3n)^3 + 3(3n)^2 + 3(3n)^2 + 1 which would give me = 3 (9n^3 + 6n^2) +1 is this correct?
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Originally Posted by Natasha I'm a complete beginner at these: Could someone please correct me if I'm wrong please (and show me where).... Here goes: (3n+1)^3 = (3n)^3 + 3(3n)^2 + 3(3n)^2 + 1 which would give me = 3 (9n^3 + 6n^2) +1 is this correct? I have marked with red ^2 in your post because in theorem its b^2 and because b=1 then b^2 =1, you have put (ab)^2 or a^2.
thanks :-)
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