Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    Find, to 2 decimal places, the roots of the equation:
    x-(2/x) = 2/5
    Offline

    14
    ReputationRep:
    (Original post by RDoh)
    Find, to 2 decimal places, the roots of the equation:
    x-(2/x) = 2/5
    times the x up, then the 5 so you get

    5x^2 - 10 = 2x

    rearrange and solve the quadratic
    Offline

    0
    ReputationRep:
    (Original post by RDoh)
    Find, to 2 decimal places, the roots of the equation:
    x-(2/x) = 2/5
    how about if u multiply both sides of the eqn by 5x.
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by kikzen)
    times the x up, then the 5 so you get

    5x^2 - 10 = 2x

    rearrange and solve the quadratic
    Thanks

    I had that, I just didn't realise it was a quadratic! Very, very stupid of me. :rolleyes:
 
 
 

University open days

  1. University of Cambridge
    Christ's College Undergraduate
    Wed, 26 Sep '18
  2. Norwich University of the Arts
    Undergraduate Open Days Undergraduate
    Fri, 28 Sep '18
  3. Edge Hill University
    Faculty of Health and Social Care Undergraduate
    Sat, 29 Sep '18
Poll
Which accompaniment is best?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.