MCQ
Given, $\ce{|A + B| = P, |A - B| = Q.}$ The value of $\ce{P^2 + Q^2}$ is:
- ✓$\ce{2(A^2 + B^2)}$
- B$\ce{A^2 - B^2}$
- C$\ce{A^2 + B^2}$
- D$\ce{2(A^2 - B^2)}$
✓
Answer
Correct option: A.
$\ce{2(A^2 + B^2)}$
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