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10 May, 15:43

Which products result in a difference of squares or a perfect square trinomial? Check all that apply. (5x + 3) (5x - 3) (7x + 4) (7x + 4) (2x + 1) (x + 2) (4x - 6) (x + 8) (x - 9) (x - 9) (-3x - 6) (-3x + 6)

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  1. 10 May, 17:29
    +1
    A, (5x + 3) (5x - 3)

    B, (7x + 4) (7x + 4)

    E, (x - 9) (x - 9)

    F, (-3x - 6) (-3x + 6)

    are correct in this scenario. C and D are incorrect.
  2. 10 May, 19:20
    0
    So the only ones that make a perfect square are (5x + 3) (5x - 3) and (-3x - 6) (-3 + 6) because if you remember the formula for a perfect square is (x^2-1) ^2 = (x + 1) (x - 1)
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