Asked by hannah
                B. The rational expression   is not defined for any values of 
20^2-180/4x^2+36+ 72
for which the denominator equals zero. Find the value(s) of for which the denominator equals zero.
            
        20^2-180/4x^2+36+ 72
for which the denominator equals zero. Find the value(s) of for which the denominator equals zero.
Answers
                    Answered by
            Steve
            
    so, just solve
4x^2 + 36x + 72 = 0
x^2 + 9x + 18 = 0
That should help...
    
4x^2 + 36x + 72 = 0
x^2 + 9x + 18 = 0
That should help...
                    Answered by
            hannah
            
    C. The company accountant says that the rational expression  will never have a zero denominator because  , the number of units, is always a whole number. Explain why the accountant is correct.
20^-180/4^2+36x+72
this is the second part can you help me
    
20^-180/4^2+36x+72
this is the second part can you help me
                    Answered by
            Meyla
            
    I have no idea . 
    
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