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12 November, 20:58

Which is the best step to do next to solve the equation by

completing the square?

The first few steps in solving the quadratic equation 5x2 +

27x = 14 - 13x by completing the square are shown.

5x2 + 27x = 14 - 13x

5x2 + 40x = 14

5 (x2 + 8x) = 14

5 (x2 + 8x + 16) = 30

5 (x2 + 8x + 16) = 94

5 (x2 + 8x + 4) = 18

5 (x2 + 8x + 4) = 34

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Answers (2)
  1. 12 November, 21:16
    0
    5 (x2 + 8x + 16) = 94

    Step-by-step explanation:

    I got it right on Edge
  2. 12 November, 21:58
    0
    Answer:The correct answer among the choices given is option 2.

    Completing the square is done as follows:

    1. Write the equation in a way that the constants are in the right side while the terms with x are on the left.

    5x^2 + 27x + 13x = 14

    5x^2 + 40x = 14

    2. Make sure that the coefficient of the x^2 term is 1.

    5 (x^2 + 8x) = 14

    3. Adding a term to both sides that will complete the square in the left side. This is done by dividing the coefficient of the x term by 2 and squaring it. Note: The same amount should be added to the right side to balance the equation.

    5 (x^2 + 8x + 16) = 14 + 80

    5 (x+4) ^2=94
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