Related Topics:

More Lessons for Math Trivia

Math Worksheets

Examples and videos to explain Standard Deviation Formula, Fibonacci Formula, Completing the square and Quadratic Formula.

**Standard Deviation Formula Explained**

The formula for standard deviation looks scary and feels scary. Why on earth would anyone want to measure a sense of "spread" of data values with a formula like that??!!!? Well, let me tell you the very natural and very human story that explains why.
**Fibonacci Formula**

The Fibonacci numbers begin 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, .... What's the 100th number in this list? The 587th number? In this video we derive a general formula the N-th Fibonacci number.

(WARNING: This video assumes complete familiarity with solving a quadratic equation, basic properties of exponents, and solving a tiny system of equations.)

**Completing the Square Part I**

Here's the simple way to solve quadratic equations by completing the square.**Completing the Square Part II**

Here's the second section of video on how to solve quadratics with ease.**Deriving the Quadratic Formula**

After learning how to complete the square, see how quickly and magically the famous quadratic formula pops out at you!

More Lessons for Math Trivia

Math Worksheets

Examples and videos to explain Standard Deviation Formula, Fibonacci Formula, Completing the square and Quadratic Formula.

The formula for standard deviation looks scary and feels scary. Why on earth would anyone want to measure a sense of "spread" of data values with a formula like that??!!!? Well, let me tell you the very natural and very human story that explains why.

The Fibonacci numbers begin 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, .... What's the 100th number in this list? The 587th number? In this video we derive a general formula the N-th Fibonacci number.

(WARNING: This video assumes complete familiarity with solving a quadratic equation, basic properties of exponents, and solving a tiny system of equations.)

Here's the simple way to solve quadratic equations by completing the square.

Here's the second section of video on how to solve quadratics with ease.

After learning how to complete the square, see how quickly and magically the famous quadratic formula pops out at you!

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.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.