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10 March, 04:23

Which of the following when added to 4a^2+9 will result in a perfect square for all integer values of a?

(A) 0

(B) 3a

(C) 6a

(D) 9a

(E) 12a

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Answers (1)
  1. 10 March, 04:47
    0
    (D) 9a

    Step-by-step explanation:

    Given

    4a^2 + 9

    Add 9a to the expression

    4a^2 + 9 + 9a

    This can be written as

    (2a) ^2 + (3) ^2 + (3) ^2 a
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