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Mathematics 11 Online
OpenStudy (anonymous):

c^2+18c+81=

jimthompson5910 (jim_thompson5910):

c^2+18c+81 c^2+9c+9c+81 c(c+9)+9(c+9) (c+9)(c+9) (c+9)^2 So c^2+18c+81 factors to (c+9)^2

jimthompson5910 (jim_thompson5910):

In other words, c^2+18c+81 = (c+9)^2

OpenStudy (anonymous):

thanks

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