SOLUTION: Give the excluded value(s) for the fraction -7/x^2-2x-15

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Give the excluded value(s) for the fraction -7/x^2-2x-15      Log On


   

Question 650786: Give the excluded value(s) for the fraction -7/x^2-2x-15
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

+-7%2F%28x%5E2-2x-15%29+=+-7%2F%28%28x-5%29%28x%2B3%29%29

Denominator CANNOT be ZERO

 x ≠ 5  and x ≠ -3

Check Factoring Using FOIL

F	First terms

O	Outside terms

I	Inside terms

L	Last terms