Lecture 281 Unit 4 Lecture 28 Introduction to Quadratics Introduction to Quadratics.
SOLVING QUADRATICS DAY 3 (IN THE CALCULATOR) EQ: How can points of intersection be used to solve any...
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Transcript of SOLVING QUADRATICS DAY 3 (IN THE CALCULATOR) EQ: How can points of intersection be used to solve any...
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SOLVING QUADRATICS DAY 3 (IN THE CALCULATOR)
EQ: How can points of intersection be used to solve any equation?
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Task: Find all of the solutions of the equation
using the graphing calculator
I’m being asked to…
I’ll know I have the correct answers if …
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The expression on the left side of the equal sign is ….
The value on the right side of the equal sign is…
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Let’s Solve It!
Y1 = __________________________ (Black)
Y2 = __________________________ (Red)
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a. How can you tell by looking at the table what the solutions will be?
b. How can you tell by looking at the graph what the solutions will be?
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c. What are your solutions? X = ________ and X = _________
d. Check your solutions:
e. In what situation would this method NOT work? Why?
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Press 2nd, Calc (Trace button) and look at your different choices.
Which option could be used to find the exact solutions?
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First Curve? Second Curve?Guess?
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Calc Practice
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Ex 1) Solve using the calculator
Solutions: _______________________
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Ex 2) Solve using the calculator
Solutions: _______________________
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Summary
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Problems with you may encounter:
“Error” message:
1) Did you put the equations in correctly?
2) Do you need to change the window? Answer are written in radical form:
1) Do you have enough time to do the quadratic formula?
2) Can you determine which radical expression is equivalent?
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Check your solutions:
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You Try! Solve for x using the calculator: x(x – 5) = -3x + 1
Do you HAVE to simplify the expressions first?
Do you HAVE to set the equation equal to zero?
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#1 Find the left intersection and wait for me to check it!
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Find the left intersection and wait for me to check it!
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Find the left intersection and wait for me to check it!
![Page 20: SOLVING QUADRATICS DAY 3 (IN THE CALCULATOR) EQ: How can points of intersection be used to solve any equation?](https://reader035.fdocuments.net/reader035/viewer/2022062423/5697c01a1a28abf838ccf0d3/html5/thumbnails/20.jpg)
Find the left intersection and wait for me to check it!
![Page 21: SOLVING QUADRATICS DAY 3 (IN THE CALCULATOR) EQ: How can points of intersection be used to solve any equation?](https://reader035.fdocuments.net/reader035/viewer/2022062423/5697c01a1a28abf838ccf0d3/html5/thumbnails/21.jpg)
Find the left intersection and wait for me to check it!
![Page 22: SOLVING QUADRATICS DAY 3 (IN THE CALCULATOR) EQ: How can points of intersection be used to solve any equation?](https://reader035.fdocuments.net/reader035/viewer/2022062423/5697c01a1a28abf838ccf0d3/html5/thumbnails/22.jpg)
Find the left intersection and wait for me to check it!