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21 June, 06:48

Find the value of n such that x^2 - 3x + n is a perfect square trinomial

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Answers (2)
  1. 21 June, 07:08
    0
    X²-3x+n

    Because 3 is a prime number, n must be a fraction.

    When completing the square, n = 9/4

    x²-3x+n

    = (x²-3x + 9/4)

    = (x-3/2) ²
  2. 21 June, 07:13
    0
    Hello:

    x^2 - 3x + n is a perfect square trinomial : x²-3x+n = (x-a) ²

    x²-3x+n = x²-2ax+a²

    -2a = - 3

    a² = n

    a = 3/2

    n = (3/2) ²=9/4
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