17 points!!!!! PLEASE ANSWER
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A student was given the equation x2 + 6x − 13 = 0 to solve by completing the square. The first step that was written is shown below.

x2 +6x=13

The next step in the student’s process was x2 + 6x + c = 13 + c . State the value of c that creates a
perfect square trinomial.

Explain how the value of c is determined.