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Basic Algebra

user2020user

It's most likely because it's really late but can somebody show how these two are equal ?

Just realised. Oh God that was basic.
I reckon I need some rest.

(edited 11 years ago)

Reply 1

blueconstellation

Sorry, how come? I always get stuck on these types of question :biggrin:

Reply 2

aznkid66

Original post by blueconstellation

Sorry, how come? I always get stuck on these types of question :biggrin:

Well, if you add and subtract x in the numerator of the LHS, you get the (-x)/(1+x2), and what's leftover reduces to x(x2+1)/(1+x2)

There are probably simpler ways to do it, but that was the first method I saw.

Reply 3

Brit_Miller

Original post by blueconstellation

Sorry, how come? I always get stuck on these types of question :biggrin:

Could put the right-hand side under a common denominator so you can minus the two.

x-\frac{x}{1+x^2}

\frac{x(1+x^2)}{1+x^2}-

\frac{x}{1+x^2}

\frac{x(1+x^2)-x}{1+x^2}

\frac{x^3}{1+x^2}

Reply 4

blueconstellation

Thanks!

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Basic Algebra

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