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Math Help - factor ?

  1. #1
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    factor ?

    how do i do this problem

    factor 54x4y2z2 -36x4y3z +18x3y2z
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  2. #2
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    Quote Originally Posted by jim1174
    how do i do this problem

    factor 54x4y2z2 -36x4y3z +18x3y2z
    In the problem,
    54x^4y^2z^2-36x^4y^3z+18x^3y^2z
    First look at the numbers. Which is the largest number you can factor out? It is 18. Next look at the x, there is first x^4 then x^4 and then x^3, so you can factor x^3. Next look at y, which you can factor y^2, next look at z you can only factor one z because only one appears in the second term and third. Thus, the factor is
    18x^3y^2z. Now you need to fill by what you divided. Which gives,
    18x^3y^2z(3x-2y+1)
    Important notice the one in the end, it is 1 not 0
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