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27 July, 04:21

What number must be added to the expression below to complete the square?

x^2 - x

A. 1/2

B. - 1/4

C. - 1/2

D. 1/4

+4
Answers (1)
  1. 27 July, 04:50
    0
    The answer is D. 1/4,

    proof

    (x-1/2) ² = x²-2*1/2*x+1/4 = x²-x+1/4
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