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Mathematics 15 Online
OpenStudy (anonymous):

2 x + 6x + 5

OpenStudy (nurali):

x²+6x+9-4=0 --> (x+3)²-4=0 --> (x+3)²= 4 --> x+3= ±√4 --> x= -3 ±2 --> x= -1 or x=-5

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