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Maths help (Quadratic Equation)

Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
in Student Life & Education
Right, all I need is someone to multiply out this;
x(x-1)(x+2)
I can do the rest from there, any help is appreciated :)

Comments

  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    [Ignore this post :p Twas wrong]
    Xx
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    Haha, no problem B-A x]
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    I'm shit at maths, we had an exam today it was a "just for fun" exam that doesn't count to anything... so it's pointless anyway... but I totally failed :p

    If you're stuck on any.... errrmmm... Drama I'll help you. I'm good at drama :p
    Xx
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    From what i remember, brackets always first.

    So say x is 3

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

    3(2)(5)=

    3 x 2 x 5 = 30

    ofc i could be totally wrong
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    As far as I know, it comes out as some bloody formula, which can then be substituted into an equation x.x
    Ah well, i'm sure i'll figure it out somehow
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    You don't ever figure it out as X is a number... Just don't do it.

    We learnt it like this http://www.bbc.co.uk/schools/gcsebitesize/maths/algebra/symbolsrev3.shtml
    Xx
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    x(x-1)(x+2)

    bit in brackets = x^2 –x +2x -2
    SO = x^2 +x -2

    Multiplied by x

    X^3 + X^2 -2X

    EDIT: I think thats right. You heard of the 'grid method' for multiplying out brackets?

    EDIT2: OK, i've added in some workings for you to take a look at - see attachment.
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    PurpleStarFish is right.

    Can you multiply out two brackets normally? Its just the same as that, you just repeat the process.
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    Brilliant, thanks :D
    I really dislike this math paper. Waaay to hard.
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    I used to kick quadratic equation ass at school. But having not needed that knowledge since then I wouldn't have a clue how to do them now.
  • Former MemberFormer Member Posts: 1,876,323 The Mix Honorary Guru
    what is this???
    X being in an clever thingy maboby????
    X IS WHERE THE F******* TRESURE IS! stop making it maths related
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