Answers

2014-09-19T21:11:09+08:00
2x^2 + 4x = -3 
2x^2 + 4x +3 = 0 
x = [ -4 ±√(4² -4(2)(3)) ] /2(2) 
= [ -2 ±√(-2) ] /2 
= -1 ± i/√2 

It has no real solutions, two complex solutions.

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