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Homework Help: Okay i know i totally sux at math

  1. Nov 4, 2006 #1
    so can anyone help me with these factorisation questions?

    factorise

    18t^2 -2

    3tx-2sx+15ty-10sy

    can anyone please show me the steps thx
     
  2. jcsd
  3. Nov 4, 2006 #2

    arildno

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    Take the first.
    Factorize each term on its own. What are the common factors?
     
  4. Nov 4, 2006 #3

    arildno

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    Is it really THAT difficult for you to do a single, trivial, independent action on your own??

    That is the main reason why you suck at maths:
    Not that maths is "difficult", not that you are "dumb", but quite simply your reluctance to DO any maths at all in the first place
     
    Last edited: Nov 4, 2006
  5. Nov 4, 2006 #4
    Firstly note that there are 2 terms. 18t^2 and -2. These are both divisible by 2, so take a 2 to the front of the brackets and write it like:
    2(9t^2 -1)

    This will not factorise any further.

    You can write this as x(3t-2s)+5y(3t-2s) by simply taking the x and y terms out of each individual term. Now note that each set of brackets is the same so it can be furthermore factorised to: (3t-2s)(x+5y)
     
  6. Nov 4, 2006 #5

    arildno

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    Do you wanna bet on that? :wink:
    Don't do the homework for OP, by the way, he must show some of his own work first.
     
  7. Nov 7, 2006 #6
    let me do the first one for you........

    18t2-2 = 2(9t2-1) = 2(3t+1)(3t-1).

    see if you can do the other one.
     
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