Common Algebra Mistakes
Example: Simplifying an 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
If we look carefully at the mistake, we see that the expression has the form
which the student has mistakenly rewritten in the form
But only
then it could be rewritten as follows: A nice way to simplify the original expression is to multiply by 1 in the form shown in "The Correction", chosen so that the negative exponent factors in the numerator are cleared. |

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