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Solve the following equation by completing the square.

x² + 8x – 9 = 0

1 Answer

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Factor left sides of the equation

(x-1)(x+9) = 0

Set factor equal to 0

x-1 = 0 or x+9 = 0

x= 1 or x= -9


I hope that's help and have sweet dream !


User Matt Ranney
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