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12 April, 00:04

What number must you add to complete the square?

x2 - 18x = 29

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Answers (1)
  1. 12 April, 02:27
    0
    81

    Step-by-step explanation:

    Given

    x² - 18x = 29

    To complete the square

    add (half the coefficient of the x - term) ² to both sides

    x² + 2 ( - 9) x + ( - 9) ² = 29 + ( - 9) ²

    x² + 2 ( - 9) x + 81 = 29 + 81

    (x - 9) ² = 110
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