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17 October, 20:27

Which of the following are solutions to the equation below?

Check all that apply.

3x2 + 27x + 54 = 0

A. 9

B.-6

C. 6

D. 3

E. 3

+4
Answers (2)
  1. 17 October, 20:44
    0
    x = - 3, - 6.

    Step-by-step explanation:

    3x2 + 27x + 54 = 0

    Divide through by 3:

    x^2 + 9x + 18 = 0

    (x + 3) (x + 6) = 0

    x = - 3, - 6.
  2. 17 October, 20:45
    0
    x = - 3 or x = - 6

    Step-by-step explanation:

    Solve for x over the real numbers:

    3 x^2 + 27 x + 54 = 0

    The left hand side factors into a product with three terms:

    3 (x + 3) (x + 6) = 0

    Divide both sides by 3:

    (x + 3) (x + 6) = 0

    Split into two equations:

    x + 3 = 0 or x + 6 = 0

    Subtract 3 from both sides:

    x = - 3 or x + 6 = 0

    Subtract 6 from both sides:

    Answer: x = - 3 or x = - 6
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