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12 September, 11:54

What integer needs to be added to the expression to create a perfect square? x2 - 2x

A. - 4

B. - 1

C. 1

D. 4

+3
Answers (1)
  1. 12 September, 14:52
    0
    The answer is C.

    x² - 2x + 1

    x² - x - x + 1

    x (x) - x (1) - 1 (x) + 1 (1)

    x (x - 1) - 1 (x - 1)

    (x - 1) (x - 1)

    (x - 1) ²
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