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29 March, 21:29

What value in place of the question mark makes the polynomial below a perfect square trinomial x^2+24x+?

A) 24

B) 48

C) 12

D) 144

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Answers (2)
  1. 29 March, 21:43
    0
    Answer D

    Step-by-step explanation:

    Take half of the coefficient of x: Take half of + 24, obtaining 12. Now square this 12, obtaining 144. This is the desired value. Answer D is correct.
  2. 29 March, 21:59
    0
    D

    Step-by-step explanation:

    Perfect square trinomials can be written as (a + b) ² = a² + 2ab + b². In this case, we know that a = x so we can write this as x² + 2bx + b². Since we know that 2bx = 24x we can conclude that b = 12, so that means b² = 12 * 12 = 144.
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