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Math Help - Simplifing binomial product... I think?

  1. #1
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    Simplifing binomial product... I think?

    I really need the answers to these binomial products....

    (x+1)2-(x+1)(x-1)+(x-1)2=


    (2a+3)(a-1)+(a-1)2-(a-1)(a+1)=

    (m2-8)(m+2)-(m2+8m+2)(m-3)=

    Thanks
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  2. #2
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    btw all the 2's after the numbers are all ment to representing to the power of 2 thingiy
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  3. #3
    Super Member bigwave's Avatar
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    expand and factor

    (x+1)^2-(x+1)(x-1)+(x-1)^2

    expand the brackets

    x^2+2x+1-x^2+1+x^2-2x+1= x^2+3

    ==================================
    (2a+3)(a-1)+(a-1)2-(a-1)(a+1)

    factor out (a-1)

    (a-1)(2a+3+2-a-1)<br />
\rightarrow<br />
(a-1)(a+4)<br />
\rightarrow<br />
a^2+3x-4<br />

    ==========================
    (m^2-8)(m+2)-(m^2+8m+2)(m-3)
    again expand the brackets and combine like terms you should get
    -3m^2+14m-10
    Last edited by bigwave; March 9th 2010 at 04:05 PM. Reason: more info
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