SOLUTION: Find all numbers for which each rational expression is undefined. If expression is defined for all real numbers, state so.
1) 8
_____
x^2+4
2) 7x-14
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Question 674579: Find all numbers for which each rational expression is undefined. If expression is defined for all real numbers, state so.
1) 8
_____
x^2+4
2) 7x-14
_________
x^2-9x+20
3) x+5
_________
(x+7) (x-9)
Answer by ReadingBoosters(3246) (Show Source): You can put this solution on YOUR website!
The expressions will be undefined where 0 is the denominator
...
1)
= +/-
x = +/-
x = +/- 2i
...
2)
x = 5 and 4
...
3)
(x-7)(x-9)=0
x = 7 and 9
.....................
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