



 
Hi Michael, If $a = 0$ the expression \[\frac{\frac{a5}{a}}{\frac{4}{a}}\] is undefined. If $a \ne 0$ I would multiply the numerator and denominator by $a.$ Penny Michael wrote back: That answer did not help whatsoever. Did you multiply the numerator $\large \frac{a5}{a}$ by $a?$ What did you get? Penny
 


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