-x2/40+31x/40+4/5

Simple and best practice solution for -x2/40+31x/40+4/5 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for -x2/40+31x/40+4/5 equation: 


x in (-oo:+oo)

((-x)^2)/40+(31*x)/40+4/5 = 0

1/40*x^2+31/40*x+4/5 = 0

DELTA = (31/40)^2-(1/40*4/5*4)

DELTA = 833/1600

DELTA > 0

x = ((833/1600)^(1/2)-31/40)/(1/40*2) or x = (-(833/1600)^(1/2)-31/40)/(1/40*2)

x = 20*((833/1600)^(1/2)-31/40) or x = -20*((833/1600)^(1/2)+31/40)

x in { -20*((833/1600)^(1/2)+31/40), 20*((833/1600)^(1/2)-31/40) }

See similar equations:

| x2/40 | | b+6=c | | c-8=-1 | | r/2=3.5 | | 14=2a | | 15=u+8 | | 4(13+x)=15x | | 5z-10=25 | | 5(v-5)=8 | | 9-u=4 | | 5=35 | | 150=3x+8 | | 0.=3.5 | | y+5=y/6 | | 4v/2=10 | | 15t^2-60t=0 | | (3n-17)/(n+2) | | 9x-5=3x+10 | | 8x+9y=1600 | | x/(2-x)=1.25 | | m/5-2=6 | | k-8=3 | | x=w+y+z/8 | | y=w+x+z/8 | | x(x^3-19x-30)= | | 6-3(x+1)=7+x | | 12a+2=2a-6 | | 29-x/4 | | 4.2+4=25 | | 3X-2=12X-13 | | 5X+25=13X+71 | | 16m^2=16m+3 |

Equations solver categories