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More Lessons for Algebra II

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Videos, worksheets, solutions and activities to help Algebra II students learn about factorials.

Factorials - Evaluating Factorials!
Basic Info on Factorials and some numerical examples are provided.

Why zero factorial equals one.
Why does 0! equal one? This is weird! Multiply together all the digits from one up to zero and get one??? This video explains simply why mathematicians choose (and it is a choice!) to set this illogical quantity as equal to one.


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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