Multiple Choice Questions on If l m n 9 and l2 m2 n2 31 then the value of lm mn nl will be ........ for SSC CGL Exam Preparation

Back to Main Page

Multiple Choice Questions

If l m n 9 and l2 m2 n2 31 then the value of lm mn nl will be ........

Quantitative Aptitude (CGL) Algebra
    Download Solution PDF

    If l + m + n = 9 and l2 + m2 + n2 = 31, then the value of lm + mn + nl will be

    22

    Incorrect Answer

    50

    Incorrect Answer

    25

    Correct Answer

    -25

    Incorrect Answer
    छोटे Courses बड़े Results
    Master Algebra
    Prepare through Micro-courses
    Try Now
    Explanation:

    (l + m + n)2= l2 + m2 + n2+2(l*m + m*n + n*l);
    Hence, lm + mn + nl = 92 – 31 = 50/2= 25

    By: MIRZA SADDAM HUSSAIN
    ProfileResources

    Let's Discuss

    Master
    Algebra
    With abhipedia
    Micro Courses
    Try Now
    Explore Micro-Courses
    Mixture and Alligation
    Number System
    Simple Interest
    Profit and loss
    Average
    Problems based on Ages
    Permutation & Combination
    Partnership
    LCM, HCF
    Pipes&cistern
    Boats and Streams
    Percentage
    Problems on trains
    Simplification
    Time & distance
    Time and work
    Ratio, Proportion
    Compound Interest
    Probability
    Quadratic Equations
    Case Studies
    Number series
    Previous Year Papers
    Data Table
    Pie Chart
    Bar Graph
    Line Chart
    Mixed Chart
    Delete
    Mensuration 2D
    Mensuration 3D
    Coordinate Geometry
    Trignometry
    Degree and Radian
    Height and Distance
    Algebra
    Arithmetic progression
    Statistics
    Geometry
    Tricks and Techniques
    Approximation
    Arithmatic inequalities
    Radar Chart
    Mixed previous Year Questions
    Others
    View All
    What our students have to say
    Review on us
    Download Abhipedia Android App

    Access to prime resources

    Downlod from playstore
    download android app download android app for free