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x2 + 6x = 7

⇒ x2 + 6x + 9 = 7 + 9

⇒ (x + 3)2 = 16

⇒ x + 3 = ±4

⇒ x = -7 or 1

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โˆ™ 2011-08-05 07:48:48
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Q: What are the solutions in completing the square x2 plus 6x equals 7?
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