If it's not what You are looking for type in the equation solver your own equation and let us solve it.
X2-18X-4=0
We add all the numbers together, and all the variables
X^2-18X-4=0
a = 1; b = -18; c = -4;
Δ = b2-4ac
Δ = -182-4·1·(-4)
Δ = 340
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}$$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{340}=\sqrt{4*85}=\sqrt{4}*\sqrt{85}=2\sqrt{85}$$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-18)-2\sqrt{85}}{2*1}=\frac{18-2\sqrt{85}}{2} $$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-18)+2\sqrt{85}}{2*1}=\frac{18+2\sqrt{85}}{2} $
| 2.41=19.28x | | 4y-7=7y-4y | | 1/4x+4=14+2.75 | | x/3+0.6=0.9 | | 8t=-10 | | 8-3x=55 | | 6(7/15)+2(-3+4(7/15))=1-g | | 50=2y+8 | | 48=0.4x-7 | | -4t+1=3t+1-71 | | -9.8=-29.4/2x | | |v|-21=-13 | | 26.54-p=0.5(50+p) | | 26.54-p=0.50(50+p) | | x3−4x2−x+4=0 | | x/16=25X | | 43e=1,376 | | 26.54-p=0.59(50+p) | | 3x+2/3=1/6 | | w-10=5.8 | | 55+4y-24=14y-11-3y | | 2x2+4x-6=0x | | 0=4.905x^2+7.1685468561x-0.65 | | 8s=1,000 | | 36=1/2h(9) | | 5x+26=3x+32x= | | --8=7c-5c | | 5x+26=3x+32,×= | | 5–6u=-4u–7+4u | | 4k=6+5k | | -5-(15y-16)=2(7y-16)-y | | (6w+8)/5+(w+5)/6=12 |