SOLUTION: Need assistance please with applications using rational equatins and proportions. thanks for your help Find all numbers for which the rational expression is not defined. 3/x

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Question 21815: Need assistance please with applications using rational equatins and proportions. thanks for your help
Find all numbers for which the rational expression is not defined.
3/x
4/x-6
x+5/x^2-36
x2-3x+2/x^2+x-30
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
Denominators can NEVER equal zero. Therefore, the following values are NOT allowed, because they would make the denominators equal to zero.

3%2Fx+
x cannot equal zero!

4%2F%28x-6%29+
x cannot equal 6, because that value of x makes the denominator zero. NOT allowed!

%28x%2B5%29%2F%28x%5E2-36%29
Factor the denominator:
%28x%2B5%29%2F%28%28x-6%29%28x%2B6%29%29
x cannot equal either +6 or =6!

+%28x2-3x%2B2%29%2F%28x%5E2%2Bx-30%29
Factor the numerator and denominator:
+%28%28x-2%29%28x-1%29%29%2F%28%28x%2B6%29%28x-5%29%29
x cannot equal -6 or +5, since these values make denominators zero.

R^2 at SCC