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1 June, 03:09

Solve the system y = 2x - 4 and y = (x - 1) 2 - 5

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  1. 1 June, 03:32
    0
    Hello:

    y = 2x - 4 ... (1)

    y = (x - 1) ² - 5 ... (2)

    subsct in (2):

    2x - 4 = (x - 1) ² - 5

    2x - 4 = x² - 2x + 1 - 5

    x² - 4x = 0

    x (x-4) = 0

    x = 0 or x = 4

    if : x = 0 y = 2 (0) - 4 = - 4

    if : x = 4 y = 2 (4) - 4 = 4

    two solutions : (0, 4), (4, 4)
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