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Mathematics 21 Online
OpenStudy (anonymous):

Solve x^2 + 2x + 9 = 0 x= -2 +_ 4i sqrt 2 x= -2 +_ 2i sqrt 2 x= -1 +_ 4i sqrt 2 x= -1 +_ 2i sqrt 2

OpenStudy (anonymous):

[-2+- sqrt(2^2 - 4*1*9] / 2 -2 +- sqrt(-32) = -2 +_ sqrt (-16)*2 = -2 +- 4i sqrt 2

OpenStudy (anonymous):

ok ?

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