Evaluating Functions - Basic Introduction | Algebra

This algebra 2 math video tutorial provides an introduction into function notation. It discusses evaluating functions with a single variable x and using 2 variables x and y. It explains how to find the missing x or y variable using techniques such as factoring trinomials, GCF, and by grouping in addition to using the quadratic formula. This video contains plenty of examples and practice problems.

Introduction to Functions:

Evaluating Functions:

Function Operations:

Increasing and Decreasing Functions:

Relative Maximum & Minimum Values:

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Relations and Functions:

Domain and Range From a Graph:

How To Find The Domain of a Function:

Average Rate of Change of a Function:

The Difference Quotient of a Function:

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Evaluating Piecewise Functions:

Graphing Piecewise Functions:

Composite Functions:

How To Evaluate Composite Functions:

Composite Functions - Data Table:

Comp. of 3 Functions - Data Table:

Decomposing Functions:

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Introduction to Inverse Functions:

How To Find The Inverse of a Function:

Verifying Inverse Functions:

Horizontal Line Test - 1 to 1 Functions:

Vertical Line Test:

Graphing Inverse Functions:

Composite and Inverse Functions:

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Even and Odd Functions:

Transformations of Functions:

Linear Functions:

Functions and Graphs - Problems:

Functions - Test Review:

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Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

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[HCH-mods]

hello teacher, in exercise n 4 i tried to solve it using the formula ( -b +/- root of b^2 - 4ac ) / 2a but i my soluition was different ? is there a mistake in using this formula in this example?

[chrizneon]

You didn't use MDAS rule? Because you said in problem "9+15-7" is 15-7 first?

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This one.is a lil too advanced for.me.at the moment. Will be back to this one.soon.

[nosir]

I’ve noticed something when solving a Quadratic Formula by factorisation question.
If the co-efficient of A is 1, then the two numbers multiplied to make the product will have to change into its inverse
Example
x^2 – 4x + 4

Because the co-efficient is one, I could find the product of 4 but it needs to total to -4. This will be -2 and -2
All I have to do is the inverse of -2 which would be 2. The answer is x = 2

Does this apply for every quadratic formula problem with the co-efficient of A being 1??

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what is the purpose of subtracting 5 to x^2 - 4 +9 and how did that happen? it is in 3:53 minutes of the video. Thanks

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