If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2-6.4x-6=0
a = 1; b = -6.4; c = -6;
Δ = b2-4ac
Δ = -6.42-4·1·(-6)
Δ = 64.96
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{-(-6.4)-\sqrt{64.96}}{2*1}=\frac{6.4-\sqrt{64.96}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-6.4)+\sqrt{64.96}}{2*1}=\frac{6.4+\sqrt{64.96}}{2} $
| 40x-1.5=9x+1.5 | | 2m/5=2/5m-4 | | a+1.25=2a- | | 180=x+4x-2 | | 4x^2+7x+7=9 | | 180=4x-2 | | 8x-20=-10-7x | | -15-2n=-65 | | 7+2(x-5)=3(x-4) | | -12-3(x-4)=-3x | | -(4x+8)=12 | | 4-2(x+6)=8 | | 44=2(4x-5)+x | | -1(4x+8)=12 | | 187=13-y | | 180=8+16x+18x-6 | | 180=x+128+120 | | (6x-9)=(2x-19) | | -2+5x+12=20 | | 6=-5x+16 | | 7-3y=36 | | 5-6(1/2x-8)=76 | | 41x-3=90 | | 9v-27=v+43+4v | | 5t+35=t+37+t+36 | | 80=5/6(3x-14) | | 4z+40=31+z+25 | | 15z-22=50+z+43 | | v+33=v+1+v | | (2x+3)^2=-16 | | 0=5x+4x-18 | | (x+3)^2=16x |