The Student Room Group

Core 3 Question ?

Basically I need help with this question I get that x+2 is a multiple of xsquared - 4 but then what else do I do from there
rewrite (X^2- 4 ) as (x + 2)(x - 2) and then see if it's clearer :smile:
Reply 2
Establish a common denominator.

Spoiler

Difference of two SQUUUUUUUARES.

The first fraction should be changed into (x + 2) (x - 2)

From this make both denominators the same and add
Original post by DanScott96
Basically I need help with this question I get that x+2 is a multiple of xsquared - 4 but then what else do I do from there


To add/subtract algebraic fractions you need to make the denominators the same. First, factorise x24x^2-4 Hint: think difference of two squares.

:smile:

Edit: Looks like I got beaten to it!
(edited 10 years ago)
Reply 5
Ok I think I get it now :smile: , so would this be correct ?
Original post by DanScott96
Ok I think I get it now :smile: , so would this be correct ?


Rotate your image before you post it.
Reply 7
Ok sorry have I done it wrong though
Reply 8
your ans should be 2 / (x+2)(x-2)
Reply 9
Original post by DevilSmite
your ans should be 2 / (x+2)(x-2)

Ok I've got that now thank you
Original post by Mr M
Rotate your image before you post it.



Rotate your head before you read it...

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