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Published byBlaise Wade Modified over 5 years ago

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Today’s daily quiz will be given after today’s lecture, during the last 10 minutes of class. 1

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Please CLOSE YOUR LAPTOPS, and turn off and put away your cell phones, and get out your note- taking materials.

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Section 5.6B Dividing Polynomials, Part 2

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Review of the steps in long division: 1.Divide 2.Multiply 3.Subtract 4.Bring down Then repeat these steps until you can’t bring down or divide any longer. Section 5.6 Part 2

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Important: Remember that you DO NOT need to use long division when dividing a polynomial by a monomial! Which of the following problems require long division? Yes No

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Make sure you know how to CHECK your answer from a long division problem a). Without a remainder b). With a remainder Check this problem to see if the answer is correct: + 5. Answer is: ____CORRECT ___INCORRECT X

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Two tricky things to watch out for: 1.When the terms of either the polynomial in a long division problem are not written in order of degree from highest to lowest. First step in this case: Write the polynomial terms in the proper order BEFORE you start dividing. 2. When the polynomial is missing one or more terms in the degree order. First step in this case: Insert a “0x n ” term in place of the missing nth degree term BEFORE you start dividing. Why is this important? Because you have to make sure you are always subtracting LIKE TERMS.

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Example: HINT: Start by rewriting the inside polynomial as 16b 2 – 8b – 5. This helps you make sure you are always subtracting like terms. Answer: Make sure you always practice CHECKING your answers on homework problems so you know how to do it on the test!

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Example: HINT: Start by rewriting the inside polynomial as 2x 3 – 4x 2 + 0x – 6. This helps you make sure you are always subtracting like terms. Answer: 2x 2 + 2x + 6 + 12. x – 3 Make sure you always practice CHECKING your answers on homework problems so you know how to do it on the test!

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Example: Answer: x 2 + 12x + 144. Make sure you always practice CHECKING your answers on homework problems so you know how to do it on the test!

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The assignment on this material (HW 5.6B) is due at the start of the next class session. You can now open your laptops and work on this assignment until it’s time to take the quiz. (You’ll have 8 minutes to take the quiz, so that you will have time to check your answers.)

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Please open your laptops, log in to the MyMathLab course web site, and open Quiz 5.6A. You may use the pink formula sheet on this quiz – please don’t write on this sheet, and remember to hand it back in with your quiz answer sheet. You have 8 minutes to take the quiz, so take time to check your answers.

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