If it's not what You are looking for type in the equation solver your own equation and let us solve it.
g in (-oo:+oo)
(1/4)*g^2-((15/2)*g) = 0
(1/4)*g^2+(-15/2)*g = 0
1/4*g^2-15/2*g = 0
DELTA = (-15/2)^2-(0*1/4*4)
DELTA = 225/4
DELTA > 0
g = ((225/4)^(1/2)+15/2)/(1/4*2) or g = (15/2-(225/4)^(1/2))/(1/4*2)
g = 30 or g = 0
g in { 0, 30 }
| -x^2+26x-120=0 | | -4p+(6p-5)=11 | | 18(2w-6)=12(3w+4) | | w^2-9=-16 | | x^3+5x-25=0 | | 5z-7+3z=19 | | y=2mx-8b | | 1-2(x+1)=3(x-2) | | -9b-3b=33 | | 7x+28=7x+4 | | x^3+5x-5=0 | | 10(.6x+1.8y)=(-12)10 | | x^3+25x-5=0 | | 2(x+1)-4=3(x-1)+2 | | 2sin(4x)cos(2x)=0 | | -35/-5=x | | 7x+(2x-5)=67 | | 3x+9=-6(6x+-3) | | 9.25=0.25x+0.75 | | 2y-7=0 | | 33=3+8(n+9) | | (7+11i)(8-11i)=0 | | 8y+12=3y-3 | | r^2+4r+13=0 | | -6s-2+4=-28 | | 9x^2+11x-10=-2x | | g^2-19g+18=0 | | x^2+2x-334=2x | | 11s^2-43s-4=0 | | 5-3x-2x-4-7x= | | 10x-5=6x+19 | | 2(2x-3)+12+2x+x^2=78 |