Factoring Polynomials

Ch. 6 Quiz

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Directions

This is a short five question multiple choice quiz. Questions will cover the types of factoring that we have studied earlier this week. Try not to use your calculator, although you may use scratch paper to work out problems and then click on the Letter of your choice to see if you were correct.

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1. Factor Completely x²-13x-14

A. (x+14)(x-1)B. (x-7)(x-2)C. (x-14)(x+1)D. (x+7)(x-2)

Correct

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Incorrect

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X²-7x-8-8·1=-8, when -8 and 1 are added together you

get -7. So therefore the answer is (x-8)(x+1).

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2. Factorm²+m-90

A. (m-9)(m+10)B. (m+9)(m+10)C. (m+9)(m-10)D. (m-9)(m-10)

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Incorrect

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m²+m-30Find a product that has a sum of 1. Positive 6 times negative 5 equals -30, when 6 and -5 are

added together you get 1. (m+6)(m-5)

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3.Factorz²-49

A. (z-6)(z+7)B. (z-7)(z+7)C. (z+9)(z-5)D. (z-9)(z+6)

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Z²-36This equation is of a perfect square, so therefore

take the square root of 36. This is the final answer. (z-6)(z+6)

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4.Factor by Grouping8r³-64r²+r-8

A. (8r²-1)(r+8)B. 8(r²+1)(r-8)C. (8r²+1)(r-8)D. (8r²-64)(r+8)

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6r³-36r²+r-66r²(r-6)+1(r-6)(6r²+1)(r-6)

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5.Factor by Grouping21k³-84k²+15k-60

A. (21k²-15)(60k+84)B. (21k²+15)(60k-84)C. 3(7k²-5)(k+4)D. 3(7k²+5)(k-4)

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Incorrect

You chose the wrong answer. Here is a sample solution to a similar problem.

63k³-54k²+105k-903(21k³-18k²+35k-30)3[3k²(7k-6)+5(7k-6)]

3(3k²+5)(7k-6)

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You have finished the practice quiz. This quiz has been sent to everyone’s email, some of these questions may appear on tomorrows test. If you finished the quiz early feel free to go back and try the questions again.

Congratulations!