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5 June, 05:08

What are the x-intercepts of y = 2x2 - 3x - 20?

A) x = - 5 and 2

B) x = 5 and - 2

C) x = - 2.5 and 4

D) x = 2.5 and - 4

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Answers (1)
  1. 5 June, 06:21
    0
    x-intercepts when y = 0

    so

    2x^2 - 3x - 20 = 0

    (2x + 5) (x - 4) = 0

    2x + 5 = 0

    x = - 5/2

    x = - 2.5

    x - 4 = 0

    x = 4

    answer:

    C) x = - 2.5 and 4
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