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Mathematics 14 Online
OpenStudy (anonymous):

please help I will give medals

OpenStudy (ipwnbunnies):

S = 4(pi)r^2 , where r = (2x + 5) First, replace r with (2x + 5). Then, if you're familiar with FOIL method, FOIL (2x + 5)^2. Finally, simplify.

OpenStudy (ipwnbunnies):

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