Non permissible Values, and Multiplying, and Dividing Rational Expressions

Hey Everyone, this is Naavi and I will be scribing today. :)

So, we started off with Non-Permissible Values.

A Non-Permissible value is any value that makes the denominator zero.

So, to determine the non-permissible value of an expression you have too either solve for the variable or factor.

Example:

5T
___
4sr(squared)


4sr(squared)=0

4s(rsquared)=o

4s=o or rsqaured = o

The final answer is:

s=0 and r=o

Makes sense? I hope so xD

Next, we multiplied Rational Expressions which is pretty simple.

For example:

4xsqrd ysqrd
_______ _______
3xy x 8x


= 4XsqrdYsqrd 4XsqrdYsqrd
___________ ___________
3xy8x 24XsqrdY

= 1
_____Y
6


= Y
_____
6

Basically all you do is multiply the coefficients and add the variables together, and then simplify the expression.

Dividing Rational Expressions:


Dividing Rational Expressions is surprisingly easier than multiplying, just remember to apply the exponent rules and simplify.

3xsquared x
_________ / ____
Ysquared y

= 3 . x . x
______________
y.y

= 3x
______
y

And yeah, that's pretty much it, sorry if it looks a little scattered. x)