ALGEBRA 2, Rational expressions, find values that make them undefined.

Undefined rational expressions.

[WeQuiltStudio]

First time I have seen the "0 denominator" concept eplained so perfectly, yet simple. Ty sooo much!

[ldrfnqb]

You answered all my questions in two minutes. Thank you !

[laurecevillacarlos]

This is very helpful. A Big Thank you, I understand so much yet still don't know how but overall I'm very thankful

[CrisAngeloBenetez]

How to Determine the restrictions of the variables x in the denominator. (Value of x that will make the expression undefined). Where the denominator should not be equal to zero..

1.) 2x-3/x
2.) 1/2x-1
3.) x²-1/x²+1
4.) x+1/5x-2
Is it possible?
#forschoolpurposesonly

[lillieinlove]

I have some questions,

1. What do you mean by "plugging in both sides"
2. 2:50 how do you get -2? How do you know that you are supposed to substract it?

[aabyy]

Next time explain your work correctly. You didn’t mention anything about 7x of the 5th equation nor how you got x-5 or x-2, you just wrote it down without the slightest explanation.