If it's not what You are looking for type in the equation solver your own equation and let us solve it.
15-18.67x+4x^2=0
a = 4; b = -18.67; c = +15;
Δ = b2-4ac
Δ = -18.672-4·4·15
Δ = 108.5689
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-18.67)-\sqrt{108.5689}}{2*4}=\frac{18.67-\sqrt{108.5689}}{8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-18.67)+\sqrt{108.5689}}{2*4}=\frac{18.67+\sqrt{108.5689}}{8} $
| 4f=3f-9 | | 4+1/2(6x-8)=2/3(9x+6)-8 | | -3y-2=-38 | | 45-56x+12x^2=0 | | 2/3n+3/4=2 | | 6x-9=47 | | 21=-6=7k | | 2x+0.5(6x-4)=3.5x+0.25(2x-16) | | 386-x=-62 | | 3(5-x)=5(x+3)-8x | | 2x+0.5(6x-4)=3.5x+0.25(2x-16 | | 9x+x=194 | | z-215=3 | | 18m+31=31 | | 2r+49=-8(-r+-5) | | 20=3m–7 | | 4/6x+2=7/3 | | 1/8(8x+26)=13+4x | | 8x+2=9x+4 | | 3(-2+7)=3-3x | | f(-12)=-12-10 | | 4(x+4)-9=15 | | -15x+-8=-24 | | X+6÷2=2x | | -76h+9=-27 | | 7.2-x=2.9 | | 10x2−13x−17=−8 | | 3(a-5)+2=5 | | 7.2*x=2.9 | | 8x-12=4(1/2×-6) | | 7x+3÷15=3 | | 7x-4=-2+2(x+9) |