If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.9x^2+5.4x+4=0
a = 0.9; b = 5.4; c = +4;
Δ = b2-4ac
Δ = 5.42-4·0.9·4
Δ = 14.76
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{-(5.4)-\sqrt{14.76}}{2*0.9}=\frac{-5.4-\sqrt{14.76}}{1.8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5.4)+\sqrt{14.76}}{2*0.9}=\frac{-5.4+\sqrt{14.76}}{1.8} $
| -1/7y=12 | | 12-6m=4-2m | | (2x+3)=(x-6) | | x=2.2(85000/3600) | | 3x+111=360 | | 4p=524 | | 0.7+x+x+x=x+3.1 | | d=2.2*(85000/3600) | | 3=8-r/r | | 2(x+8)=10x+4 | | 4x^2-3x+184x^2-3x+18=0 | | 11x+82=7x+35 | | 43x+145=360 | | 3=8-r/r= | | X+2y=50000 | | 5x=585 | | 4x+215=360 | | (3x+6)(24x-42)=0 | | a^2+a=3a+15 | | 5x+0=360 | | 26+h=42 | | 2(x-4)+3x=x+6 | | -2(3w-7)=-4 | | 9+h=14 | | 2x-1=2(6x-5)+4(5/2-3x) | | 3(2x-1)+7=6x-3-2(2x-4x) | | 0.3(2x+10)=5.5x | | 3x+117=360 | | 3(2x-1)+7=6x-3-2(2x-4x | | 2.25x=8.5 | | 5^2x=3000 | | 1/3(2x+10)=5.5x |