If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2-4x-220=0
a = 1; b = -4; c = -220;
Δ = b2-4ac
Δ = -42-4·1·(-220)
Δ = 896
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{896}=\sqrt{64*14}=\sqrt{64}*\sqrt{14}=8\sqrt{14}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-4)-8\sqrt{14}}{2*1}=\frac{4-8\sqrt{14}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-4)+8\sqrt{14}}{2*1}=\frac{4+8\sqrt{14}}{2} $
| 7^x-1=16 | | 2(3x-2)-10=2x-74 | | .05x+x=10.5 | | 9x+6/5=4 | | 0.05x+x=10.5 | | 14-6y=15 | | 4x-3=8x-13 | | 1+r÷9=0 | | 7x-8-3x=40 | | -0.6=24-x | | 2d+3=d-8 | | 4x^2+7x-34=0 | | 9z-6-5z=-46 | | 9z-6=-46 | | y-11-y+4=4y | | 4(4x-15)=52 | | y-11-y+6=6y | | 5-t/3=8 | | 13+m/4=-18 | | 0=0.2t^2-1.02t | | 4(5n+7)=-7 | | ((((x/2)+20)/3)+4)/2=15 | | x^2-18x=-18 | | (X-y)=64 | | (((x/2+20)/3))+4)=15 | | ((x/2+20)/3+4)=15 | | 4.5k+3.9=9.4k-5.8 | | x2+23x=0 | | c-5/44=0 | | 3(x-1)-13=-25 | | x^2-x+9.66=0 | | -2x+144=-9-63x |