Showing posts with label parabola. Show all posts
Showing posts with label parabola. Show all posts
Tuesday, February 3, 2009
Tuesday, January 27, 2009
Parabolas Ep. 7 - Introduction of the (0,k) Vertex Form - 22:38
KEY CONCEPTS:
In this video we see how Quadratic Function written in the form of:
y=ax^2+k - will lead us to a vertex of (0,k)
Labels:
1-3-5 Pattern,
math,
mathematics,
Mr.P,
Papapodcasts,
parabola,
parabolas,
pattern,
reflect,
reflects x-axis
Parabolas Ep. 6 - Using the 1,3,5-Pattern for Graphing - 11:30
KEY CONCEPTS: In this video we look at the 1,3,5-Pattern for graphing quadratic function (parabolas). These videos are intended for the viewer to steer away from using Table of Values and to use the Vertex form along with the 1,3,5-Pattern.
How did we come up with the 1,3,5-Pattern? Look closely at the differences in the y-axis.
Labels:
1-3-5 Pattern,
axis of symmetry,
math,
mathematics,
negative,
Papapodcasts,
parabola,
parabolas,
pattern,
reflect,
reflects x-axis,
symmetry
Parabolas Ep. 2 - The Quadratic Function - 4:16
KEY CONCEPTS:
The following video looks at the various ways that quadratic functions can be written. Be on the lookout for such equations, because if you ever come across them you'll know they form a parabola.
Labels:
math,
mathematics,
Papapodcasts,
parabola,
parabolas,
quadratic,
quadratic functions
Monday, January 26, 2009
Parabolas Ep. 11 - Steps to Completing the Square - 13:32
KEY CONCEPTS:
Completing the Square involves converting a quadratic function from STANDARD FORM into a VERTEX FORM.
Steps:
1. Group the x's together and keep the constant (c-value) off to the side.
2. Factor the a-value from x^2 and x (IF we have an a-value)
3. Divide the x-value by 2 and then square it.
4. With the value you get from Step 3, add it to your x^2 and x value and subtract it by that same value (don't forget about the c-value - we're not using it yet, until the end)
5. The first 3 terms you have form a Perfect Square Trinomial (P.S.T) - Factor your P.S.T by square rooting your first term of the PST and the third term of the PST
6. Create your binomial of squares (Special Products)
7. Multiply your a-value (IF you factored one out) with the minus value from Step 4.
8. Simplify the number from Step 7 with the c-value we set aside at the start.
Parabolas Episode 10: Completing the Square - 24:40
KEY CONCEPTS:
Completing the Square involves converting a quadratic function from STANDARD FORM into a VERTEX FORM.
Steps:
1. Group the x's together and keep the constant (c-value) off to the side.
2. Factor the a-value from x^2 and x (IF we have an a-value)
3. Divide the x-value by 2 and then square it.
4. With the value you get from Step 3, add it to your x^2 and x value and subtract it by that same value (don't forget about the c-value - we're not using it yet, until the end)
5. The first 3 terms you have form a Perfect Square Trinomial (P.S.T) - Factor your P.S.T by square rooting your first term of the PST and the third term of the PST
6. Create your binomial of squares (Special Products)
7. Multiply your a-value (IF you factored one out) with the minus value from Step 4.
8. Simplify the number from Step 7 with the c-value we set aside at the start.
9 Now you have your equation in VERTEX FORM.
Parabolas Episode 8 - Introduction of the (h,0) Vertex Form - 21:02
KEY CONCEPTS: This video looks at Quadratic Function written in the form:
y=a(x-h)^2 - where the vertex is (h,0)
**NOTE: When writing the x-value of the vertex, take the opposite sign of what's within the brackets. (i.e. y=2(x+3)^2 would give us a vertex of (-3,0)
Labels:
1-3-5 Pattern,
math,
mathematics,
Mr.P,
Papapodcasts,
parabola,
parabolas,
pattern,
reflect,
reflects x-axis
Parabolas Ep. 3 - Looking at the Differences in Simple Quadratic Expressions - 39:34
KEY CONCEPTS:
The following podcasts investigates table of values for quadratic functions. Understanding that difference we can graph other quadratic functions without the need to complete a table of values.
Labels:
math,
mathematics,
Papapodcasts,
parabola,
parabolas,
quadratic,
quadratic functions
Parabolas Episode 1 - Who Cares About Parabolas - 2:34
This short video just looks at how parabolas are everywhere.
Labels:
curve,
math,
mathematics,
Papapodcasts,
parabola,
parabolas,
quadratic,
quadratic functions
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