

3.4 Solving Quadratic Equations by Factoring
Presentation
•
Mathematics
•
10th - 11th Grade
•
Practice Problem
•
Medium
Standards-aligned
Caitlin Carlsen
Used 45+ times
FREE Resource
6 Slides • 2 Questions
1
3.4 Solving Quadratic Equations by Factoring
Get out a piece of paper and a pencil

2
Remember Back...
Before Thanksgiving Break, we reviewed how to factor
Let's see this one more time:
0=x2+9x+20
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We will use factoring to solve quadratics
Last week we used graphing:
4
Now: Zero Product Property
For any real number a and b, if ab=0 then a=0, b=0, or both a nd b are zero.
Basically the only way to multiply and get zero is to multiply by zero.
5
So from before:
0=x2+9x+20
0=(x+5)(x+4)
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Let's See Another:
0=16x2+8x
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Multiple Select
Find the solutions:
0=x2−8x+12x=-2
x=6
x=2
x=-3
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Multiple Select
Find the solutions:
0=x2+7x−8x=1
x=-1
x=8
x=-8
3.4 Solving Quadratic Equations by Factoring
Get out a piece of paper and a pencil

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