Question
Download Solution PDFIf X + Y = 23 and XY = 126; what is the value of (X)² + (Y)² = ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
X + Y = 23
XY = 126
Formula used:
(X + Y)2 = X2 + Y2 + 2XY
Calculation:
232 = X2 + Y2 + 2 × 126
⇒ 529 = X2 + Y2 + 252
⇒ X2 + Y2 = 529 - 252
⇒ X2 + Y2 = 277
∴ The correct answer is option (2).
Last updated on Jun 24, 2025
-> The CSIR Junior Secretariat Assistant 2025 has been released for 9 vacancies.
-> Candidates can apply online from 17th June to 7th July 2025.
-> The CSIR JSA salary ranges from INR 19,900 - INR 63,200 (Indian Institute of Petroleum, Dehradun & Institute of Microbial Technology) and INR 35,600 (Indian Institute of Toxicology Research).
-> The selection of candidates for this post will be based on a Written Exam, followed by a Computer Typing Test.
-> Prepare for the exam with CSIR Junior Secretariat Assistant Previous Year Papers.