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March 28, 2015

March 28, 2015

Posted by **Jo** on Thursday, December 20, 2012 at 10:45pm.

3x^2+7x=-9

- Algebra 2 -
**Reiny**, Thursday, December 20, 2012 at 11:43pmDid you mean "solve by completing the square " ?

if so, then first divide by 3

x^2 + (7/3)x = -3

x^2 + (7/3)x + 49/36 = -3 + 49/36

(x+7/6)^2 = -59/36

x+7/6 = ± √59 i /6

x = (-7 ± i√59)/6

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