Question

If P+Q=R and P-Q=S, then Rsquare+s square
equal to
1) P2 + Q2
3) 2(P2 + Q2
2) 2(P2 - 02
Q)
4) 4 PQ​

Answer 1

Answer:

3) IS CORRECT ANSWER

Explanation:

R² + S²

(P+Q)² + (P-Q)²

P² + Q² + 2PQ + P² + Q² - 2PQ

2P² + 2Q²

2(P² + Q² )