Common Calculus Mistakes
Quotient Rule 
Some problems provide the opportunity for more than one mistake. The Goal
Find
Mistake 1
Find the mistake:
(Roll the mouse over the math to see a hint in red)
(Roll the mouse over the area above to see the corrections in blue)
Find the mistake: (Roll the mouse over the math to see a hint in red) Correction 2
(Roll the mouse over the area above to see the corrections in blue) Explanations
In the first mistake parentheses should have been used around the factor z^{4}5; not using them meant that the 6z factor was not distributed over the whole factor z^{4}5. Use parentheses! 
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