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Ninth Graders Who Lack Basic Algebra Skills. Learners. E nvironment. In a Computer Lab. Objective. Students will demonstrate their abilities to solve equations by completing the square using this power point as a tutorial with 90% accuracy. By: Brittany Brown Woori Kim –Lab 04.
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Ninth Graders Who Lack Basic Algebra Skills Learners
Environment In a Computer Lab
Objective • Students will demonstrate their abilities to solve equations by completing the square using this power point as a tutorial with 90% accuracy.
By: Brittany Brown Woori Kim –Lab 04 Completing the Square
Main Menu • Lesson • Instruction for Quiz • Quiz START START START
Lesson : 9-4 Solving Quadratic Equations By Completing the Square
Why is this Important? • Since few quadratic expressions are perfect square trinomials, the method of completing the square can be used to solve some quadratic equations…
Formula • General quadratic formula • To complete the square we will only use: • “” is the end result of the complete square
Step 1: • Find your “b” in the equation Click here for explanation
Step 1: Explanation • Remember the Equation • There for in this equation + 4 is your “”
Step 2: • After you find “” in the equation. Divide “” by 2
Example 1 #Hint: Step 1: find the ; = 6 Step 2: divide Step 3: Square answer
Example 3 • Your turn…. Complete the Square • What does equal
Example 3 Continue…. • Did you Get = 144 144 =
But WAIT… What if you already have a value for “c” in the equation, but it is NOT a completed square answer? Such as…. Now what……..
Well we still need to find “” but have do a little more work First get all the numbers on one side:
Now just worry about the left hand side of the equation for the moment… Lets find Looks familiar
Now that you found what c equals, lets finish solving the problem *remember the equation Step1: add c to both sides Step 2: factor Step 3: combine like terms Step 4: take square root Step 5: get x by itself
Example 3 Your turn….. What are the values for x
Example 3 continue… Did you get
Lesson Over • Go Back to the Lesson • Go to the Instruction for the Quiz Click Here Click Here
Instructions…. • Take out a sheet paper and answer the questions. Show all your work on the paper and turn your paper at the end of the quiz. *Make sure you write down the letter answer to the questions as well Take the Quiz
Quiz Question 1-5 find the value for 1.) • 3 • 2 • 6 • 4
Quiz Cont…. 2.) • 1 • 5 • 2 • 8
Quiz Cont…. 3.) • 10 • 100 • 40 • None of the above
Quiz Cont…. 4.) • 1000 • 35 • 4900 • None of the above
Quiz Cont… 5.) • 20 • 20.25 • 9 • 24
Quiz Question 6-10 solve for x, round to the nearest tenth if necessary 6.) • 3,6 • 3,5 • 4,5 • 6,1
Quiz Cont…. 7.) • 4,9 • 6,7 • -3,5 • -5,3
Quiz Cont… 8.) • -11,-1 • 1,11 • 12,1 • 13,4
Quiz Cont… 9.) • 0.8, 5.2 • -5.2, 0.8 • 1, .9 • None of the above
Quiz Cont.. 10.) • 0.2, 4.7 • 0.3, -3.4 • -0.3, -3.7 • None of the above
Quiz is Over Turn In Your Paper First Check Answers
Quiz Answer next
Good Job This is the End of the Tutorial Return to the main menu