1. October 28th Happy Birthday tomorrow to: Alex Aviles

2. 3 forms of quadratic equations

3. 4-2: Graphing & Solving from intercept form
f(x) = (x – 2)(x + 4)
Solve each part for x =
x = 2 x = -4
The solutions are the x-intercepts

4. f(x) = (x – 2)(x + 4) Solve each part for x = x = 2 x = -4
The solutions are the x-intercepts
The AOS is ½ way between the 2 solutions.
The x-part of the vertex is -1
(-1, ?)
Plug -1 in to find y.
y = (-1-2)(-1+4)=-9

5. 2) f(x) = 2(x – 1)(x + 3)

6. Solving a quadratic from intercept form
The path of a placekicked football can be modeled by the function
f(x) = x(x – 46) where x is the horizontal distance (in yards) and y is the corresponding height (in yards).
How far is the football kicked?
What is the footballs maximum height?

7. Changing from factored to standard form
f(x) = -(x – 2)(x + 4)
What should you do?

8. If a > 0 it opens UP If a < 0 it opens DOWN
vertex form
standard/general form
factored form
If a > 0 it opens UP If a < 0 it opens DOWN

9. Homework