# Solving Quadratic Equations By Factoring

Document Sample

```					Solving Quadratic Equations By
Factoring
Chapter 5
Section 2
Warm Up Factoring – Always look
for the GCF
• 1. x  4 x  3        x  9 x  14
2                   2
2.                  3. x  3x  10
2
Warm Up Factoring – Always look
for the GCF
• 4.   2x  7 x  3
2            • 5.   6x 2  9x  5
Warm Up Factoring – Always look
for the GCF 2
• 6.
2
5 x  5 x  10   • 7.   3x  12x  15
Factoring
What it is…..                      What this means….
• We are not going to graph        • Visualize the kickoff in a
anymore…..                         football game…
• But we are going to “solve” a    • When the football is placed on
quadratic by factoring and         the ground, and where it hits
setting each ________ equal        the ground again, these are
to zero                            called the “solutions” of the
• Each value of ___ will give        quadratic
you where the parabola crosses
the _________
• This is called Solving the
Using Factoring
• Steps:
▫ Factor the Equation           x  3x  18
2

▫ Set equations equal to 0      ( x  6)(x  3)
▫ Solve for x
x  6  0 and x - 3  0
x  6 and x  3
Now let’s use our own work!!!!
1. Go back to the warm up problems.
2. Set each problem equal to zero.
3. Solve for x. These are your solutions.
Example
• Write the equation of quadratic in standard form
if the solutions are x = 4, and x = -6.
On a little piece of paper
• Write the equation of a quadratic in standard
form if the solutions are x = 10 and x = -4
CLASSWORK

Pg 260 # 4,5,10, 11, 12

HMWK : PG 260 # 23-28, 35-40, 47-50, 56-59,
65-70

```
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
 views: 11 posted: 11/14/2011 language: English pages: 10