If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.4x^2-x+0.4=0
We add all the numbers together, and all the variables
0.4x^2-1x+0.4=0
a = 0.4; b = -1; c = +0.4;
Δ = b2-4ac
Δ = -12-4·0.4·0.4
Δ = 0.36
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{-(-1)-\sqrt{0.36}}{2*0.4}=\frac{1-\sqrt{0.36}}{0.8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+\sqrt{0.36}}{2*0.4}=\frac{1+\sqrt{0.36}}{0.8} $
| 4+b/3=-2 | | 7.2=u÷1.5 | | 3+m÷4=-1 | | 3j-4-j=12 | | 18=((0.05-x)(0.1-x))/(x^2) | | X+2y+64=0 | | (x-1)^2+(x-1)^2=0.0225 | | X+2x+64=0 | | 4(7-2x)=8 | | 1/5x-3/8x=1/10 | | (x-1)^2+(x-1)^2=0.15^2 | | -4x-4=-5-4x | | 7x−1+26=2x | | x-6=-6+6x | | -7=-7+x/3 | | x^2-2x+1=0.01125 | | 5(2x+5)+5=100 | | 2(8x+6)=-116 | | 3y–9=36 | | -8x+3-8=3 | | 35-(6-4x)-(3x-2)=31x-(42x-22) | | 6+x/8=4 | | 4/7n=14 | | -58=-3x-4 | | 1/2(x+5)=5 | | -39-x=8(3-8x) | | 15x-12=130 | | 4X+33/9=-3x= | | x+3*4=60 | | 3m+6=90 | | y/6+y/2=7/5 | | A-(2a+4)-(4a+3)=X |