How to find the number of terms in the expansion of $(a+b+c)^2$?
Can anyone help me in finding its formula with proof?
2026-04-09 16:59:08.1775753948
How to find the number of terms in the expansion of $(a+b+c)^2$?
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We basically have to divide the power of $2$ amongst the $ a , b, c$. Let the powers be $ x, y , z $.
$ x+y+z = 2$ where x , y,z are integers.
So the answer is $6$.
Using the formula $C_{ r-1}^{n+r-1}$