In the expansion of ${(x + a)^n}$, the sum of odd terms is $P$ and sum of even terms is $Q$, then the value of $({P^2} - {Q^2})$ will be
In the expansion of ${(x + a)^n}$, the sum of odd terms is $P$ and sum of even terms is $Q$, then the value of $({P^2} - {Q^2})$ will be
- A
${({x^2} + {a^2})^n}$
- B
${({x^2} - {a^2})^n}$
- C
${(x - a)^{2n}}$
- D
${(x + a)^{2n}}$
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