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    vermonstervt's Avatar
    vermonstervt Posts: 2, Reputation: 1
    New Member
     
    #1

    Aug 2, 2005, 04:46 PM
    explain how to do this one
    please explain how to do this one it says to simplify by adding like terms
    2x^2 y+3yx^2+x^2 y-x^2 y-4x^2 y^2
    colbtech's Avatar
    colbtech Posts: 748, Reputation: 66
    Senior Member
     
    #2

    Aug 3, 2005, 12:04 AM
    I think my maths is OK for this. Other posters may knock me back at will but if you extract each term of the statement it looks easier:

    2x²y + 3yx² + x²y - x²y - 4x²y²

    1) 2x²y

    2) 3yx²

    3) x²y

    4) - x²y

    5) - 4x²y²

    For a start terms 3 and 4 cancel each other...

    and terms 1 + 2 can be added, just because they are written slightly differently x²y and yx² doesn't matter

    So you should end up with

    5x²y - 4x²y²

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