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26 August, 16:34

Which polynomial is a perfect square trinomial?

36x2 - 18x - 9

4a2 - 28a - 49

25b2 - 40b + 16

4x2 - 6x + 9

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Answers (1)
  1. 26 August, 20:33
    0
    25b^2 - 40b + 16 = (5b - 4) ^2

    so this is the right answer sure
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