Question 79244
2x^2+10x+11=0
2(x^2+5x) = -11
x^2+5x+(5/2)^2= -11/2 + 25/4
(x+(5/2))^2 = 3/4
(x+(5/2)) = sqrt3/2 or (x+(5/2)) = -sqrt3/2
x=(-5+sqrt3)/2  or x=(-5-sqrt3)/2
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Cheers,
Stan H.