Solving for "x"

[CalebsMomma]

Can someone explain how to solve for "x" by using Zero-value check on a fraction?
The example I have is (x^2+7x+2)/(x^2-1) which it then says using the zero-value check and it plugs in -2 in for "x", but I am unsure how they came to that conclusion?

 

[Aladdin]

Can someone explain how to solve for "x" by using Zero-value check on a fraction?
The example I have is (x^2+7x+2)/(x^2-1) which it then says using the zero-value check and it plugs in -2 in for "x", but I am unsure how they came to that conclusion?

This fraction can be defined for the denomenator bieng different from zero ( the domain ) -- But I still dont get your question.

 

[Deleted member 4993]

Can someone explain how to solve for "x" by using Zero-value check on a fraction?
The example I have is

(x^2+7x+2)/(x^2-1)

Your problem does not have an "=" sign , hence cannot be solved for 'x'

Please post a complete problem.


which it then says using the zero-value check and it plugs in -2 in for "x", but I am unsure how they came to that conclusion?