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    sir ather3's Avatar
    sir ather3 Posts: 3, Reputation: 1
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    #1

    May 1, 2008, 01:27 AM
    fully factorise (quadratic algebra)
    :confused: the worked example does not help me at all as I can not make sense out of it. This is the example 9 "x" squared - 6 "x" plus one
    =(3"x")squared - 2 multiplied by 3"x" multiplied by 1 + 1squared
    =(3"x"-1)squared

    when expanded how wold the get the origanal equation.

    all my answers were wrong when I went to check my work

    IF ANY ONE READING THIS IS INVOLVED IN STANDARD LEVEL MATHMATICS YEAR 11 IB THE QUESTIONS ARE TOP OF PAGE 250.

    The book (if it is the same as mine) will be titled mathematics for the international student mathematical studies SL
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    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    May 1, 2008, 02:05 PM
    The example is correct. Starting with:



    It multiplies out as follows:
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