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3 August, 18:37

Solve the system of equations y=4x+1, y=x2+2x-2

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Answers (2)
  1. 3 August, 18:39
    0
    Option D

    (-1,-3) and (3,13)

    Given in the question two equations

    y = 4x + 1

    y = x² + 2x - 2

    Equate both functions

    4x + 1 = x² + 2x - 2

    rearrange the x term and constant

    -x² + 4x - 2x + 2 + 1 = 0

    -x² + 2x + 3 = 0

    factors

    -x * 3x = - 3x²

    -x + 3x = 2x

    -x² - x + 3x + 3 = 0

    -x (x+1) + 3 (x+1) = 0

    solve

    (x+1) (3-x) = 0

    x = - 1

    and

    x = 3

    Plug these values in equation to find y

    x = - 1

    y = 4 (-1) + 1

    y = - 3

    x = 3

    y = 4 (3) + 1

    y = 13
  2. 3 August, 18:48
    0
    Option d is the answer to your question
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