SOLUTION: Look at the expression 4x-12/x^2-16. If x was replaced with 3, would the expression be considered defined? Why or why not? If x was replaced with 4, would the expression be con

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Look at the expression 4x-12/x^2-16. If x was replaced with 3, would the expression be considered defined? Why or why not? If x was replaced with 4, would the expression be con      Log On


   

Question 255005: Look at the expression 4x-12/x^2-16. If x was replaced with 3, would the expression be considered defined? Why or why not? If x was replaced with 4, would the expression be considered defined? Why or why not? Is there another value for x that would make this expression undefined?

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
+4 and -4 would make this expression undefined because the denominator would become 0. Division by zero is undefined.
The zero numerator with x=3 would make the expression equal to zero.