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Which of the follwong numbers must be added to complete the square in the equation below? x^2+6x-19=23 A.19 B.3 C.-9 D.9
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Which of the follwong numbers must be added to complete the square in the equation below?

x^2+6x-19=23

A.19 B.3 C.-9 D.9

User Noun
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9..........................
User Yoelp
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