
Solve Quadratics by factoring
Presentation
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Mathematics
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10th - 12th Grade
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Practice Problem
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Easy
Standards-aligned
C Blomgren
Used 50+ times
FREE Resource
10 Slides • 1 Question
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Solve Quadratics by factoring
Find the zeros, roots, solutions
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Open Ended
Solve the quadratic function by factoring.
y = x2 - 9x + 20
make y = 0 and factor x2 - 9x + 20
When you factor x2 - 9x + 20 you get
(x - 4)(x - 5)
Now set both sets of parenthesis = to 0 and solve for the variable.
x - 4 = 0 and x - 5 = 0
9
Solve a quadratic by factoring
x - 4 = 0 x - 5 = 0
x = 4 or x = 5
These answers are the solutions, roots or zeros of the quadratic. That means that this is where the graph crosses the x-axis.
The points will be (4,0) and (5, 0)
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Solve Quadratics by factoring
Find the zeros, roots, solutions
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