Question

if P + Q=12 and PQ=22, then find P^2+Q^2.
[For more information, look the 9th question in the image.]

Answer 1

We know that P² + Q² + 2PQ = (P+Q)²
P² + Q² = (P+Q)² - 2PQ = 12² - 2(22) = 144 - 44 = 100
Therefore, P² + Q² = 100

Answer 2

this is the answer for your question.