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:
• Functions - Vertical L...
Evaluating Functions:
• Evaluating Functions -...
Function Operations:
• Function Operations
Increasing and Decreasing Functions:
• Increasing and Decreas...
Relative Maximum & Minimum Values:
• Identifying The Relati...
_____________________________________
Relations and Functions:
• Relations and Function...
Domain and Range From a Graph:
• Domain and Range of a ...
How To Find The Domain of a Function:
• How To Find The Domain...
Average Rate of Change of a Function:
• Average Rate of Change...
The Difference Quotient of a Function:
• Difference Quotient
_____________________________________
Evaluating Piecewise Functions:
• Evaluating Piecewise F...
Graphing Piecewise Functions:
• Graphing Piecewise Fun...
Composite Functions:
• Composite Functions
How To Evaluate Composite Functions:
• How To Evaluate Compos...
Composite Functions - Data Table:
• How To Evaluate Compos...
Comp. of 3 Functions - Data Table:
• Composition of Three F...
Decomposing Functions:
• Decomposing Functions ...
_________________________________
Introduction to Inverse Functions:
• Introduction to Invers...
How To Find The Inverse of a Function:
• How To Find The Invers...
Verifying Inverse Functions:
• Verifying Inverse Func...
Horizontal Line Test - 1 to 1 Functions:
• Horizontal Line Test a...
Vertical Line Test:
• Vertical Line Test
Graphing Inverse Functions:
• Graphing Inverse Funct...
Composite and Inverse Functions:
• Composite Functions an...
__________________________________
Even and Odd Functions:
• Even, Odd, or Neither ...
Transformations of Functions:
• Transformations of Fun...
Linear Functions:
• Linear Functions
Functions and Graphs - Problems:
• Functions and Graphs |...
Functions - Test Review:
• Functions
______________________________________
Final Exams and Video Playlists:
www.video-tutor.net/
Full-Length Videos and Worksheets:
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[@TheOrganicChemistryTutor]

Next Video: kzbin.info/www/bejne/hYqyiYCve7CiqsU Final Exams and Video Playlists: www.video-tutor.net/ Functions and Graphs: kzbin.info/www/bejne/kIWop2uFo6yUrtE Transformations of Functions: kzbin.info/www/bejne/qqq0faNsrZJ6pbc Graphing Polynomial Functions: kzbin.info/www/bejne/qICylpmaprKpqqM

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[@DaMightyfire]

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[@HCH-mo5ds]

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?

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[@nosir1479]

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??

[@judetheman1562]

So you were saying that X always equals the inverse of the two middle terms

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[@mr.aguilar7072]

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

[@kkiimchii7535]

Right. I didnt really understand when it was said that they " factored the trinunerial of the quadratic formula" 3:52 I dont understand how x= 2 the checking yes but how is it equivalent like how is the 4 = -4x but

[@ComicWorldsTV]

Do you need to apply GEMDAS?

[@lowkye.4195]

How did you get 5x50 and 5x2 in 6:44

[@chrizneon8065]

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

[@jym2r]

you get the same answer either way lol

[@gero3015]

9:42 quadratic formula for finding y

[@earthy7435]

Why did we subtract -100 from 48 and not the 5y^2

[@vasavimandava2155]

What about BODMAS rule?

[@BooskeyRt]

Note to self: x represents the x on the other side of the equation, and f represents everything else. Makes a lot more sense.

[@HecticHamster]

2:34

[@katlegolesole1632]

for problem at 10:00 the answer shouldnt it be 5.2

[@uhuhuhuwhauwhauwhaaha7918]

nope, you can test the function by replacing X with 4 and Y with the result, and if you set Y= -2 the function will turn out = 48 + 32 +20 which is 100, and the problem confirms that f(x, y) is equal to 100.

[@chickennuggetdelight2977]

I am lost in question 4

[@sofiaesmores897]

Same

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[@kp5736]

I forgot all math, I don't understand questions 3 and 4 😅😭

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[@neomillmarcreas6535]

8:00

[@HecticHamster]

1:09

[@hamuelagulto796]

I don't think it's proper to call f(x) as f.

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[@diamondrichards9270]

this is so confusing how am i supposed to do physics and chem if i cant get the basic math. im dying and literally crying here..... UGHHHHHHHHH

[@marouans7755]

it wont click for the first time just keep trying

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[@waynebaudelaire]

I did not understand what was happening in problem number four at all😅😅😅

[@stuckfart]

i didnt either at first, but after watching his vid on polynomials it make a little more sense

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[@muzammilhussain17]

=9+15-7 =24-7 =17

[@darkff8765]

Am lost at ques 3

[@yesno-en8mg]

You have to learn Quadratic Equations first

[@chousana1225]

thank u but please speak louder i cannot focus 😭

[@zxraye]

Sorry I'm bobo talaga sa math

[@gyannizell4597]

sameee, lalo na sa question 4 omg

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[@stuckfart]

completely lost me on question 3. tf is going on 💀

[@stuckfart]

i watched some videos on polynomials and now im a little bit less lost :-)

[@russellbonesteel1115]

How can a valid second degree trinomial function have no real solution? the discriminate is -5