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21 December, 20:09

A student was given the equation x^2 + 6x - 13 = 0 to solve by completing the square. The first

step that was written is shown below.

x^2 + 6x = 13

The next step in the student's process was x^2 + 6x + c = 13 + c.

State the value of c that creates a perfect square trinomial.

Explain how the value of c is determined.

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Answers (1)
  1. 21 December, 21:50
    0
    C would = (b/2) ^2

    Therefor 6/2=3

    3^2 = 9
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