Question

if Pbar +Qbar =Rbar and Pbar -Qbar =Sbar then R square+S square is eaual to​

Answer 1

Answer:

Simple answer 2(P²+Q²)

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Answer 2

Answer:

2(P^2+Q^2)

Explanation:

Pbar+Qbar=Rbar

Pbar-Qbar=Sbar

Sbar+Rbar=Pbar-Qbar+Pbar+Qbar

Sbar^2+Rbar^2=(P-Q)^2 + (P-Q)^2

=P^2+Q^2+2PQ+P^2+Q^2-2PQ

(cancel +2PQ and -2PQ)

=2(P^2+Q^2)