Writing Quadratic Functions - YourTeacher.com - Algebra 2 Help

For a complete lesson on writing quadratic functions, go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to write quadratic functions using the formula f(x) = a[x^2 -- (sum of roots)x + (product of roots)]. For example, to write the quadratic function that has a vertex of (7, -5) and x-intercepts of 6 and 8, note that the x-intercepts are the roots, so the first step is to find the sum and product of the roots and substitute these values into the formula. Next, substitute the coordinates of the vertex in for x and f(x) in the formula, then solve for a. Finally, substitute the value of a, the sum of the roots, and the product of the roots into the original formula to write the quadratic function.

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• quadratic
• functions
• function
• write
• math
• equation
• equations
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[IH8H8ers123]

holy shit your voice hurts, i cant pay attention

[baseballkid077]

Wow this couldn't have been explained any better

[WZAofficial]

thanks

[ToxicImagination]

I was going to bitch you all out for being so mean about this persons voice, until I actually heard it..oh my god

[waverip3rs]

this teaches more then my teacher does in a week...

[Sarah94ist]

monotone much!

[divinecm]

this vid is about learning math, not about noticing her voice -.-

[SPCtacular1]

Your Voice is worse than my teachers and that says a lot holy shit its sounds like your drunk and puking or something

[WannaBTutor]

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[raider1fan]

perfect! it helped a lot. thanks