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18 December, 07:29

Systems of equations. What are the two solutions with work?

y=x^2-5x-4

y=-2x

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Answers (1)
  1. 18 December, 07:38
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    Y = x² - 5x - 4

    y = - 2x

    -2x = x² - 5x - 4

    + 5x + 5x

    3x = x² - 4

    0 = x² - 3x - 4

    0 = x² - 4x + x - 4

    0 = (x + 1) (x - 4)

    0 = x + 1 or 0 = x - 4

    - 1 - 1 + 4 + 4

    -1 = x 4 = x
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