SOLUTION: Please help me find all numbers for which the rational expression is not defined. x^2-3x-4 over x^2-18x+77. Thank you

Question 107517This question is from textbook Intermediate Algebra
: Please help me find all numbers for which the rational expression is not defined. x^2-3x-4 over x^2-18x+77. Thank you This question is from textbook Intermediate Algebra

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Please help me find all numbers for which the rational expression is not defined. x^2-3x-4 over x^2-18x+77.
:

:
The expression is undefined when the denominator = 0
Find the values of x which make the expression = 0
:
= 0
Factors to
(x - 11)(x - 7) = 0
x = +11
and
x = +7
:
Substituting these two values for x; makes the denominator = 0; hence undefined
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