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An equation and the first step in its solution are shown: Equation: x2 + 8x - 9 = 0
Step 1: x2 + 8x +____ = 9+____
What number should be put in the____ to solve the equation by the method of completing the square?
A. 16
B. 12
C. 8
D. 4​

Respuesta :

Answer- A-16

Because when doing completing the square, you divide the coefficient of x by 2, which is 4, and the square it which is 16

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