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Maths - quadratic fraction simplification help! Watch

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    Simplify the fraction - (x2+3x-10) / (x2-2x)

    This is OCR Maths Unit C GCSE if that's at all relevant. We;ve only learnt cross division - multiplication?

    Do I need to factorise the quadratic? - If so, I got - (x+5) (x-2) - but i don't know where to go from there...

    Any help would be greatly appreciated. Sorry if the question isn't written clearly.
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    So you've simplified the top, and can't do anything else there. Where else can you simplify?
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    Factorise the denominator.
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    The question is worth 4 marks - I don't understand?!
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    The bottom. Factorise that also and then cancel.
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    I cant find the two number combinations though - (x-1)2 - expands out to give -1? (x-1) (x+1) gives -1? I've tried others also and can't find the factorised solution :-(
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    Oh.... is it just x(x-2) ? Sorry I'm so stupid.
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    If it cancels to (x+5)/x - does it then cancel further to just 5?
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    (Original post by Raza098)
    If it cancels to (x+5)/x - does it then cancel further to just 5?
    No. That is right.
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    (Original post by Raza098)
    If it cancels to (x+5)/x - does it then cancel further to just 5?
    No. You can probably leave it like that and get the marks, but if you want to cancel further then you have to remember that it is (x+5) all divided by x. Maybe separate it into different terms to see how you can do this?
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    (Original post by Hormonal)
    No. That is right.
    As in leave it as (x-5)/x?

    How come when I sub values in it comes to 0 though?
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    Oh - is it just coz I used 2? - when I did x=3 it seemed to work . Thank you! I'm supposed to be in a maths comp. on Thursday too - sounds promising ...
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    (Original post by Raza098)
    As in leave it as (x-5)/x?

    How come when I sub values in it comes to 0 though?

    (Original post by Raza098)
    Oh - is it just coz I used 2? - when I did x=3 it seemed to work . Thank you! I'm supposed to be in a maths comp. on Thursday too - sounds promising ...
    The only time it will equal 0 is when x=5.
 
 
 
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