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25 January, 15:58

Which of the following is a quadratic equation that has roots of 2.5 and 2/3

a. 5x^2+11x-7=0

b. 6x^2-19x+10=0

c. 5x^2+11x-10=0

d. 6x^2+19x-10=0

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Answers (1)
  1. 25 January, 16:21
    0
    Multiply

    (x-2.5) * (x-.66666)

    x^2 - 3.1666 x + 1.6666

    Multiplying both sides by 6

    6x^2 - 19x + 10

    answer is b
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