ixambee.com
New Enroll in RBI Grade B New Batch - Starts on May 21

    • My Home
      • Dashboard
      • My Account
      • My Courses
      • My Performance
      • Packages
      • Logout
    • youtube Free Videos
      Youtube VideosLive Classes RBI Grade BLive Classes SEBI Grade ALive Classes IBPS PO & RRB
    • Previous Year Paper
    • Exams
    • Online Course
    • Free Mock Test
    • General Awareness
    • Daily Practice
    • All Courses
    • Private Jobs New
    • Testimonials
    ixambee mentorbee
    1. Home
    2. Questions
    3. Quantitative Aptitude
    4. Algebra
    5. If (r + s) = 7 and rs = 15, then find the value of (r² + s²).

    Question

    If (r + s) = 7 and rs = 15, then find the value of (r² +

    s²).
    A 19 Correct Answer Incorrect Answer
    B 25 Correct Answer Incorrect Answer
    C 27 Correct Answer Incorrect Answer
    D 31 Correct Answer Incorrect Answer

    Solution

    According to the question,
    (r + s) ² = 7²
    ⇒ r² + s² + 2rs = 49
    ⇒ r² + s² + 2(15) = 49
    ⇒ r² + s² + 30 = 49
    ⇒ r² + s² = 49 – 30 = 19

    Practice Next
      More Algebra Questions
    • Who is recognised as the Father's of the Internet?

    • Which Function key is commonly used to access the boot menu during computer startup to select a boot device, like a USB drive or CD/DVD?

    • What do you call the memory  that stores recently-used information in a place where it can be accessed extremely fast?

    • A font in which the two-dimensional blank spaces between each pair of characters all have a visually similar area is called ___________.

    • __________ are attempts by individuals to obtain confidential information from you by falsifying their identity.

    • What type of topology is found in a WIRELESS LAN?

    • try-catch-finally is a term associated with

    • A Backup refers to

    • A _______ operation may give access to the top without modifying the stack.

    • _________ is billionth of a second.

    Relevant for Exams:

    • SSC CGL

    Please Register/Login to Download Question

    I Pledged to:

    Please Enter Details

    call-back
    Please enter Name We'll never share your email with anyone else.
    Please enter Correct Mobile Number We'll never share your email with anyone else.

    Thank You

    +91-9205524028 Available Mon-Sat (10 AM to 7 PM)

    [email protected]

    © ATOZLEARN EDUTECH PRIVATE LIMITED All rights reserved.

    Update Address

    Please enter complete address
    Please enter pincode
    Please enter State
    Please enter City

    Download the app

    ×
    QR Code
    Get Started with ixamBee

    Start learning 50% faster. Sign in now

    Please enter Mobile Number Please enter valid Mobile Number
    Please enter Mobile Number Please enter valid Mobile Number
    Email id already Exists Please Enter valid Email Address
    Please enter valid OTP Mail sent on your email