If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2n^2+18n+28=0
a = 2; b = 18; c = +28;
Δ = b2-4ac
Δ = 182-4·2·28
Δ = 100
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{100}=10$$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(18)-10}{2*2}=\frac{-28}{4} =-7 $$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(18)+10}{2*2}=\frac{-8}{4} =-2 $
| x+787=126 | | 4m-m+m+2m+4m=20 | | r+11+8r=29* | | 7/6=x720 | | 5x+37=87¸ | | 0,45y+3,4=0,71 | | 3y+y-y=15 | | x+10+90-(10-5x)=180 | | 4x+3x=5=19 | | 0.75+7a=2.80 | | 14p-11p-2p+3p-p=18 | | 3m^2-30m+72=0 | | x/90=12/15 | | 76-74=t | | 2+3x+x=5x+15 | | 16t+2t-16t+3t+2t=7 | | 2.5a-5+4.5a+3=-149 | | 3/x+5/x-2=1 | | 3(y-3)+4(2+y)=0 | | -2+7x+2x=-101 | | 5u-5u+2u=10 | | 14m-9m-4m=17 | | 3x-3+4=2-x-3 | | 3x-1+4=2-x+3 | | X^2+15x+39=0 | | 11a^2+10a=-2 | | 5n+n-3n-n+2n=4 | | 3x+1=-x-1 | | 3x+3=-x+5 | | 3x-3+4=2-x+3 | | 2(103-x)=10(2x+3) | | 2.5x+.5x=3.5+3.5x |