Common Algebra Mistakes
Example: Radical Expression 
The Goal
Simplify the expression:
The Mistake
Find the algebra mistake: (Roll the mouse over the algebra to see a hint in red) The Correction
(Roll the mouse over the area above to see the correction in blue) An Explanation The equal quantities in the denominator are added, not multiplied. There are two such square root quantities, giving the correct simplified expression. 
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