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30 July, 16:19

What number must be added to the expression below to complete the square? X^2-7x

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  1. 30 July, 16:29
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    49/4

    Step-by-step explanation:

    x² - 7x + (7/2) ² = (x-7/2) ²

    x²-2x·7/2 + (7/2) ² = (x²-7/2) ²

    (7/2) ²=49/4
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