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6 November, 18:26

Determine the discriminant of x2 = 4.

A. 17

B. 16

C. - 15

D. - 10

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Answers (2)
  1. 6 November, 18:31
    0
    X² = 4

    x² - 4 = 0 comparing to a x² + bx + c = 0, a = 1, b = 0, c = - 4

    Discriminant = b² - 4ac

    b² - 4ac = 0 ² - 4*1*-4 = 0 + 16 = 16

    Discriminant = 16.

    option B
  2. 6 November, 18:35
    0
    The discriminant is b ²-4ac

    We can rewrite x ² = 4 to x ² + 0x - 4 = 0

    So a = 1, b = 0, c = - 4

    Δ = 0 - 4 * 1 * - 4

    Δ = 16

    The answer is B
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