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If `A` and `B` are the sums of odd and even terms respectively in the expansion of `(x+a)^n` tehn `(x+a)^(2n)-(x-a)^(2n)=`

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If `A` and `B` denote respectively the sums of odd terms and even terms in the expansion `(x+a)^{n}`
Then,`(x+a)^{n}=A+B ldots(1)`
`(x-a)^{n}=A-B . .(2)`
Squaring and subtraction equation (2) from (1) we get
...
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