If it's not what You are looking for type in the equation solver your own equation and let us solve it.
d in (-oo:+oo)
((1*d)/2)*d+3/8 = -2*d // + -2*d
((1*d)/2)*d-(-2*d)+3/8 = 0
(d/2)*d+2*d+3/8 = 0
1/2*d^2+2*d+3/8 = 0
DELTA = 2^2-(3/8*1/2*4)
DELTA = 13/4
DELTA > 0
d = ((13/4)^(1/2)-2)/(1/2*2) or d = (-(13/4)^(1/2)-2)/(1/2*2)
d = (13/4)^(1/2)-2 or d = -((13/4)^(1/2)+2)
d in { -((13/4)^(1/2)+2), (13/4)^(1/2)-2 }
| 3a^4-12a^2= | | 6c-22=3c | | r/3-6=4 | | 5k^2-80= | | 1/2d+3/8=-2d | | 4v^2-56v+192= | | -x^2+6x-12=0 | | 3/x+2 | | 2v^2-14x-36= | | 4/5*-5*2/3*6 | | 4n^2+44+96= | | 3x/3=7 | | 21=m+9 | | -5(a+1)=4 | | 4a^2-36a+72= | | 6f+4=8 | | 2(x+.25)=4 | | (7+v)(5v-2)=0 | | 2m^2-14m+20= | | 3x+9=35 | | 5x-(4x-1)=12 | | 6u^3v^9y^7+4u^6y^3= | | -8=5n-23 | | 9/5=27/y-7 | | -3/4=-1/8x | | 5x-.5=25 | | 12x^2-5=17x | | -10b-7=4+4+1b | | 5=7-2t | | 12x-5=17x | | 4/3+2/3x=41/18+7/6x+1/6 | | 7x=200+3x |