Maths question help anyone

Discussion in 'BlackHat Lounge' started by realdeal85, Jul 23, 2013.

  1. realdeal85

    realdeal85 Junior Member

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    Hi i have a question its fairly simple but i just cant get my head round it.

    I need to multiply out and than simplify the following equation.

    a(b-c) +b (c-a)

    I have the answer but i need to know how to get to the answer , The answer is = c(b-a)

    if any help on how you get that answer will be of great help.
     
  2. umerjutt00

    umerjutt00 Jr. VIP Jr. VIP

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    a(b-c) +b(c-a)

    = ab -ac +bc -ba

    = ab -ba -ac +bc

    = -ac + bc

    = c (b-a) [Answer]

    I think that's the true answer.
     
  3. realdeal85

    realdeal85 Junior Member

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    thanks for the reply can you tell me how you got from =ab-ac+bc-ba to = ab-ba-ac+bc to = -ac+bc = c=(b-a)

    If you are busy please do not reply i do not want to waste peoples time sir
     
  4. umerjutt00

    umerjutt00 Jr. VIP Jr. VIP

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    =ab -ac +bc -ba

    // rearranging

    = ab - ba -ac + bc

    // ab and ba are equal to each other ab=ba
    // so ab - ba =0

    = -ac + bc

    //taking c as common

    = c(-a + b)

    //rearranging

    = c(b - a) [ANswer]
     
  5. realdeal85

    realdeal85 Junior Member

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    brilliant mate thanks a bunch i wish you all the success in life.
     
  6. umerjutt00

    umerjutt00 Jr. VIP Jr. VIP

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    In which grade are you?
     
  7. gregevskye

    gregevskye BANNED BANNED

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    Your are brilliant in Mathematics and your also insert the comment there that will help to everyone to understand it easily. You did a great job Good luck.
     
  8. 3eester

    3eester Power Member

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    c(b-a) is the right answer