Find the number of terms in the expansions of the following: `(2x-3y)^9`

Explanation

As we know

Number of dissimilar terms in the expansion of

`(x_1+x_2+x_3+......+x_r)^n is \
^(n+r−1)(C_n)`

So in `(2x-3y)^9` we have `r=2` and `n=9`

So according to formula

`=>\ ^(9+3-1) C_9`

`=>\ ^11 C_9`

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