quadratic formula

Am I doing this right?

2x^2 +12x-5=0
A=2; B=12; C= -5



-12+ sqrt12^2- 4(2)(-5) / 2(2)


-12 + sqrt 144+40 / 4



-12 + sqrt 184/4


-12 + 2 sqrt 46 /4


2 (-1 + sqrt 46)/ 2x4


-1 + sqrt 46/ 4

Close, but need grouping to make it right.
[-12 +sqrt(12^2-4(2)(-5))]/(2(2)
[-12+sqrt(144+40)]/4
[-12+sqrt 184]/4
[-12+2 sqrt (46)] /4
Then you went astray because of grouping.
-3+(1/2)sqrt(46)

oooo.. I see what did wrong!!

Thank you VERY much!!

Deb