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24 November, 08:43

What number should be added to the expression x2 + 12x to change it into a perfect square trinomial? (a. 6 (b. 18 (c. 12 (d. 36

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  1. 24 November, 11:58
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    Hello:

    x²+12x = x²+2 (6) (x)

    = x²+2 (6) (x) + 6²-6²

    = (x-6) ² - 6² ... (answer : d; 36)
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