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

The following diagram gives some examples of simplifying factorial expressions. Scroll down the page for more examples and solutions for simplifying factorials.
Simplify Factorials

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

Factorial Expressions
How to calculate the value of expressions with factorials?

How to simplify factorial expressions with variables?

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.

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
Mathway Calculator Widget

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