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Math Help - i need help with these factor problems

  1. #1
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    i need help with these factor problems

    i need help on factoring these the chapter is called "5-11 using several methods of factoring"


    2x^4-162




    25z^3-36y^2z




    can you show how you did it to
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  2. #2
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    Quote Originally Posted by elfen_lied View Post
    i need help on factoring these the chapter is called "5-11 using several methods of factoring"


    2x^4-162
    2x^4-162
    2(x^2-81)
    2(x^2-9^2)
    2(x-9)(x+9)



    25z^3-36y^2z
    25z^3-36y^2z
    z(25z^2-36y^2)
    z(5^2z^2-6^2y^2)
    z[(5z)^2-(6y)^2]
    z(5z-6y)(5z+6y)
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  3. #3
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    oh and i need help on this problem also


    6x^2+22xy-8y^2



    edit:and this

    x^3-x+6x^2-6
    Last edited by elfen_lied; November 30th 2006 at 08:28 PM.
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  4. #4
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    Quote Originally Posted by elfen_lied View Post
    oh and i need help on this problem also
    6x^2+22xy-8y^2
    edit:and this
    x^3-x+6x^2-6
    Hello,

    I haven't much time, so I send you only the results:

    6x^2+22xy-8y^2=6x^2-2xy+24xy-8y^2 =2x(3x-y)+8y(3x-y)=(3x-y)(2x+8y)

    x^3-x+6x^2-6=x(x^2-1)+6(x^2-1)=(x^2-1)(x+6)=(x+1)(x-1)(x+6)

    EB
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