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23 September, 03:47

Which polynomial is a perfect square trinomial?

a. 25^x2 - 20x - 16

b. 9a^2 - 30a - 25

c. 25b^2 - 15b 9

d. 16x^2 - 24x 9?

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Answers (1)
  1. 23 September, 05:59
    0
    A polynomial is a perfect square trinomial if in form

    a^2x^2-2ab+b^2

    look at each

    we can eliminate A and B since we have - b^2 not + b^2

    look at the rest

    C. 5^2b-3*5*b+3^2

    nope

    D. 4^2x^2-2*4*3x+3^3

    yes

    answe is D (factors to (4x-9) ^2)
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