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19 August, 17:48

What number should be added to the expression x^2 + 6x to change the it into a perfect square trinomial?

options

6, 3, 9, 12

(Can choose multiple answers)

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Answers (1)
  1. 19 August, 21:29
    0
    9

    Step-by-step explanation:

    (A+B) ^2 = A^2 + 2AB + B

    X^2 + 6X + 9 = (X + 3) (X + 3)
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