Simplifying Rational Expressions HELP

Hi all,

I cannot understand why this does not work.

So I thought I could just cancel out the fraction x^2 in both the numerator and dominator as it is a common factor.

Why does this not work?

For example, the fraction below we can simplify it by dividing top and bottom by 5 and p^2 as they are common factors.

So why does the above one not let us divide by x^2 as it is also a common factor?

Re: Simplifying Rational Expressions HELP

Hint :

Re: Simplifying Rational Expressions HELP

That doesn't explain anything to me :S

I know what a quadradric is but I still don't get why we can't factor out the top and bottom by x^2.

Re: Simplifying Rational Expressions HELP

The problem is that you have an incorrect idea of what a factor is! is NOT a factor in both numerator and denominator because it is added, not multiplied. "Factors" are parts of products, not sums.

Re: Simplifying Rational Expressions HELP