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8 April, 04:47

What is the value of c such that: x2 + 14x + c, is a perfect-square trinomial?

A. 7

B. 98

C. 196

D. 49

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Answers (1)
  1. 8 April, 05:08
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    We know that in a perfect square trinomial, the terms are:

    a² + b² + 2ab

    Here we have x = a. So b is:

    14x = 2 (x) (b)

    b = 7

    To complete the trinomial, we need b²

    7² = 49

    Option D is the answer
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