All Junior Cert Mathematics posts
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    Algebric fractions tommymcc02

    I was out the day we did these and when my maths teacher went through them with me he was a bit rushed and i still don't really understand them. My maths exam is in two days and i need help.

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      arthurmoran

      Hahahahahahahahahahahahahaha

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      SryanBruen

      http://revisionmaths.com/gcse-maths-revision/algebra/algebraic-fractions

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      JiteshKhatri

      Cross multiply and put it all over one denominator. Then simply simplify

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      Conall_Molloy

      You get Susie rogers and multiply it by the doncha donuts

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      mossy_oc

      Hi conall

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      Conall_Molloy

      suh dude

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      arthurmoran

      So tommy i have a fantastic method just get susie rogers and take her with u to fast food fridays with all the boys

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      EA22

      We had our maths exam today and algebraic fractions did not come up !! I was so happy 😂

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      JamesClavin

      same

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      arthurmoran

      EA22 you lucky boy lets be best friends

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      Conall_Molloy

      Arthur stop trying to improve your social status by getting likes on a website

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      Alex F

      Hi

      Algebraic fractions are simply fractions with algebraic expressions on the top and/or bottom.

      When adding or subtracting algebraic fractions, the first thing to do is to put them onto a common denominator (by cross multiplying).

      When adding or subtracting algebraic fractions, the first thing to do is to put them onto a common denominator (by cross multiplying).

      e.g. 1 + 4

      (x + 1) (x + 6)

      = 1(x + 6) + 4(x + 1)

      (x + 1)(x + 6)

      = x + 6 + 4x + 4

      (x + 1)(x + 6)

      = 5x + 10

      (x + 1)(x + 6)

      Solving equations

      When solving equations containing algebraic fractions, first multiply both sides by a number/expression which removes the fractions.

      Example

      Solve 10 -2 = 1

      (x + 3) x

      multiply both sides by x(x + 3):

      ∴ 10x(x + 3) - 2x(x + 3) = x(x + 3)

      (x + 3) x

      ∴ 10x - 2(x + 3) = x2 + 3x [after cancelling]

      ∴ 10x - 2x - 6 = x2 + 3x

      ∴ x2 - 5x + 6 = 0

      ∴ (x - 3)(x - 2) = 0

      ∴ either x = 3 or x = 2

      Just remember to attempt every question,even it looks difficult, you get attempt marks from writing the first sentence

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