If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-.2x^2+80x-2000=0
We add all the numbers together, and all the variables
-0.2x^2+80x-2000=0
a = -0.2; b = 80; c = -2000;
Δ = b2-4ac
Δ = 802-4·(-0.2)·(-2000)
Δ = 4800
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{4800}=\sqrt{1600*3}=\sqrt{1600}*\sqrt{3}=40\sqrt{3}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(80)-40\sqrt{3}}{2*-0.2}=\frac{-80-40\sqrt{3}}{-0.4} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(80)+40\sqrt{3}}{2*-0.2}=\frac{-80+40\sqrt{3}}{-0.4} $
| 9x-18=0ñ | | 6(x/2)+6(x/3)=6(5) | | 10y+8(10)-30=180 | | -8n+4(6+2n)=3(n+8) | | 6(1-5n)+6n=4n+6 | | 5(x+4)-2x=6(12-x)+3x+2 | | -30-8k=-5(7k+6) | | 108=-4x+60 | | 45m^2-320=0 | | 2/5w+3=7/5w | | x/3+4x/9=28 | | m/10=3/10 | | -2/7=1/2y-1/3 | | V=300x+-70x2+4x3 | | 27^-x+3=81 | | 5(y-3)-8y=-27 | | 6+12x=114 | | 9x+6=754 | | 257=138-w | | 2+3x/5+3-x/3=41/15 | | 26=7g-63=12 | | 939x=3 | | 0.3x+0.11=0.03 | | (z/5)-(z/4)=(z-2/4) | | 4x—2(x-8)=2(x+1)+2 | | 48x+10x^2−2x^3=0 | | 48x+10x2−2x3=0 | | 9x/3=10 | | 1/3z+6=12 | | N×8=72.n | | (z/5)-(z/4)=(z-2)/4 | | -3(6y-8)-y=-4(y-5) |