SOLUTION: Find all numbers that must be excluded from the domain of the rational expression. {{{(x-4)/(x^2+6x+8)}}}

Algebra.Com
Question 770156: Find all numbers that must be excluded from the domain of the rational expression.

Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!


Denominators can never = 0, so

   x² + 6x + 8 ≠ 0

(x + 4)(x + 2) ≠ 0

x + 4 ≠  0;  x + 2 ≠  0
    x ≠ -4       x ≠ -2

So -4 and -2 must be excluded from the domain.

Edwin
RELATED QUESTIONS

Find all numbers that must be excluded from the domain of the rational... (answered by ewatrrr)
Find all numbers that must be excluded from the domain of the rational expression.... (answered by ReadingBoosters)
Find all numbers that must be excluded from the domain of the rational expression. x-9 / (answered by josgarithmetic)
Find all numbers that must be excluded from the domain of the rational expression. x -... (answered by solver91311)
find all numbers that must be excluded from the domain of the following rational... (answered by Fombitz)
Simplify the rational expression. Find all numbers that must be excluded from the domain... (answered by dabanfield)
Explain how to determine which numbers must be excluded from the domain of a rational... (answered by robertb)
Determine the value(s) of the variable that must be excluded from the domain. x + 8... (answered by nerdybill)
Explain why a number(s) must be excluded from the domain of a rational expression and how (answered by josgarithmetic)