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Maths, Addmaths and Statistics: Post your doubts here!

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and it is a fact that you have to open the campus more than half the distance between the two points
 
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I tried it but I still dont get the exact points. Usama suggest me hardest paper 1. I wanna assess myself.
 
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1/1-x +2/1+x +2x/x2 -1 I know it's an easy question but someone please tell me how to simplify these types of questions any one pleeaaazzz???!!
 
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1/1-x +2/1+x +2x/x2 -1 I know it's an easy question but someone please tell me how to simplify these types of questions any one pleeaaazzz???!!


Look, (1-x) (1+x) =x^2 -1^2

So, multiply the first fraction by 1 +x, the second by 1-x and the third by nothing. This will give you x^2 -1 in the denominator. Solve the numerators and simply.
 
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