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OpenStudy (anonymous):
solve x^2+2x+9=0
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OpenStudy (anonymous):
Equations of the form a x^2 + b x + c = 0 are quadratic and have two solutions x = [-b +- sqrt(b^2 - 4 a c ] /(2a)
OpenStudy (anonymous):
i got x=2+4i sqrt2 @douglaswinslowcooper
OpenStudy (cggurumanjunath):
|dw:1386605408204:dw|
OpenStudy (anonymous):
Must divide by 2a = 2 to get the answer. Also note the solutions are -1 +-2i sqrt(2) Need the + or - .
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