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Thread: I Need Math Help Please :(

  1. #1
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    I Need Math Help Please :(

    I Need help. Can you teach me how to be able to Expand simplify
    Last edited by Mike16; Feb 4th 2008 at 11:55 AM.
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  2. #2
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    Quote Originally Posted by Mike16 View Post
    I Need help. Can you teach me how to be able to simplify Eg.-(k+6)-(2+k)+(8+4k)
    $\displaystyle -(k+6)-(2+h)+(8+4k)$

    First, distribute each +/- sign into the parenthesis...

    $\displaystyle -k-6-2-h+8+4k$

    Order by variables (a + 2a - 3b + 4b + c + 2...)

    $\displaystyle -h+4k - k + 6-2+8$

    Add like variables, (e.g. 4a + 2a - 3a = 3a)

    $\displaystyle 3k-h+12$
    Last edited by colby2152; Feb 5th 2008 at 11:38 AM.
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  3. #3
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    Ok i think i got it... Can any 1 else Help with Expand and simplify?
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  4. #4
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    Quote Originally Posted by Mike16 View Post
    I Need help. Can you teach me how to be able to Expand simplify
    Any 1 Please help me eg 4(2y-3) and -3(2y-2)+4(2y-1)
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  5. #5
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    Quote Originally Posted by Mike16 View Post
    Any 1 Please help me eg 4(2y-3) and -3(2y-2)+4(2y-1)
    Well, in order to expand and simplify, you have to remember your properties. The property you would use in those instances would be the distributive property.

    Let's start with the first example...

    $\displaystyle 4(2y-3)$

    First distribute the 4. That means to multiply the 4 by 2y and then by -3.
    $\displaystyle 4*2y-4*3$

    Now let's simplify.
    $\displaystyle 8y- 12$


    -----------------------

    Now for the second example. This time we're going to break up the problem.
    $\displaystyle -3(2y-2)+4(2y-1)$

    Let's start off with $\displaystyle -3(2y-2)$.

    First distribute the -3. That means to multiply the -3 by 2y and then by -2.
    $\displaystyle -3*2y-3*-2$
    This adds up to $\displaystyle -6y+6$.

    Now let's move onto $\displaystyle 4(2y-1)$.

    First distribute the 4.
    $\displaystyle 4*2y -4*1$

    This adds up to $\displaystyle 8y-4$.

    Now let's add both together, shall we?
    $\displaystyle -6y+6+8y-4$

    This equals
    $\displaystyle 2y+2$
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    thank you
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  7. #7
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    Quote Originally Posted by colby2152 View Post
    ...

    $\displaystyle -h+4k - k + 6-2+8$

    Add like variables, (e.g. 4a + 2a - 3a = 3a)

    $\displaystyle 3k-h$
    Hi,

    I don't want to pick at you but unfortunately you have forgotten to add 12:

    $\displaystyle -h+4k - k + 6-2+8 = -h +3k +12$
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  8. #8
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    Quote Originally Posted by earboth View Post
    Hi,

    I don't want to pick at you but unfortunately you have forgotten to add 12:

    $\displaystyle -h+4k - k + 6-2+8 = -h +3k +12$
    No offense taken... thank you earboth! I envisioned that six was negative instead of positive!
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