If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2+6.9x+2=0
a = 1; b = 6.9; c = +2;
Δ = b2-4ac
Δ = 6.92-4·1·2
Δ = 39.61
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{-(6.9)-\sqrt{39.61}}{2*1}=\frac{-6.9-\sqrt{39.61}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(6.9)+\sqrt{39.61}}{2*1}=\frac{-6.9+\sqrt{39.61}}{2} $
| c+56=180 | | -3.6-5x=11.9 | | x-2.8=3.6 | | 0=5+-2(3+-4x) | | 4x+10–9x–17=15 | | 2+14x=85 | | X+5=-3x-39 | | C(x)=0.10x+9.75 | | 38=-3(2x-4) | | 5x+10=1x | | -5x-30=5 | | -5x-30=‘5 | | 12+7x=48+x | | 9/10=5/6x | | 3(-x-3)=21 | | z/6+4=−16 | | k/3+5=22 | | k3+5=22 | | 3/4=2/5x | | 5.2=-1.9+e | | x+5.1=-6.8 | | 1/5+p=4/5 | | x+5/3=22/3 | | y/4+16=43 | | 16-3q=+40 | | -18-5p=18-7p | | r-6=10 | | 12+10u=13u | | 20=m+14 | | 15-17+17s=18s-9 | | 4n−24=12 | | 9b+7=79 |