If it's not what You are looking for type in the equation solver your own equation and let us solve it.
5a^2+39a+28=0
a = 5; b = 39; c = +28;
Δ = b2-4ac
Δ = 392-4·5·28
Δ = 961
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{961}=31$$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(39)-31}{2*5}=\frac{-70}{10} =-7 $$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(39)+31}{2*5}=\frac{-8}{10} =-4/5 $
| 8/15x=-40 | | 8v-8=37 | | x-5x-10=9+2-7 | | 2(4m+8)=3(3m-3) | | 0.3x=0.9 | | k-11/6=7/2 | | 2a^2+15a+25=0 | | 4c^2+3c-10=(c+2)(4c-5) | | 12/x+13=6 | | 7v^2+35=0 | | Y+3=13x | | 6/11=18/(k-5) | | 3(x+4)+8=5x | | -21-8a=-1+6+(4-5a) | | -3k^2=-6 | | 6+b=0 | | 1/4x+8=5/8x+2 | | x4-7=12 | | y=50+50*7 | | 1/3+x=5/3 | | 8/20=30/c | | 20x^2-45x-84=0 | | 2b-1=b+4 | | 3n^2+16n=0 | | 2.5(x+20+4.5+1.5(x-3)=15 | | 9x+39=12x+39 | | -6.6=1.0z+7.4 | | 9d–9=10d | | 1.25•60x+7=43.25 | | 3-3x=9+2x | | 17/8.5=z/0.01 | | 13y=-12y+100 |