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Best Answer

x2+8x+9 = -7

x2+8x+9+7 = 0

x2+8x+16 = 0

(x+4)(x+4) = 0

Therefore: x = -4 and also x = -4 (they both have equal roots)

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14y ago
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Q: X2 plus 8x plus 9 equals -7?
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