SOLUTION: Find all numbers in which the rational expression is not defined for; 2x-7/x^2+5x-4

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Question 612420: Find all numbers in which the rational expression is not defined for;
2x-7/x^2+5x-4
Found 2 solutions by ewatrrr, lynnlo:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi, 

Find all numbers in which the rational expression is not defined for;

%282x-7%29%2F%28x%5E2%2B5x-4%29

the rational expression is not defined when Denominator = 0

x^2+5x-4 = 0

x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+

x+=+%28-5+%2B-+sqrt%28+41%29%29%2F%282%29+   ||Not defined for these x-values

Answer by lynnlo(4176) About Me  (Show Source):
You can put this solution on YOUR website!
4x^2-49/2x^3+17x^2+27x-28