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9 September, 02:06

Solve the system of equations algebraically. Show all your steps.

y = x^2 + 2x

y = 3x + 20

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Answers (1)
  1. 9 September, 02:31
    0
    X^2 + 2x = 3x+20

    -3x

    x^2 - 1x = 20

    - 20

    x^2 - 1x - 20=0

    (x-5) (x+4)

    x-5 = 0 or x+4=0

    x = 5 or x = - 4
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