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27 February, 05:22

Which of the following expressions is a factor of the polynomial x ^ 2 + 3/2 x - 1?

a. x-1/2

b. x-2

c. x-1

d. x+3/2

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Answers (1)
  1. 27 February, 08:32
    0
    Solve by completing the square

    x^2 + 3/2x+9/16=25/16

    (x+3/4) ^2=25/16

    (x+3/4) ^2-25/16=0

    (x+3/4-5/4) (x+3/4+5/4) = 0

    (x-1/2) (x+2) = 0
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