If it's not what You are looking for type in the equation solver your own equation and let us solve it.
9x^2+30x-39=0
a = 9; b = 30; c = -39;
Δ = b2-4ac
Δ = 302-4·9·(-39)
Δ = 2304
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{2304}=48$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(30)-48}{2*9}=\frac{-78}{18} =-4+1/3 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(30)+48}{2*9}=\frac{18}{18} =1 $
| -49=4x-1 | | 2r+3r=35 | | 26+18x+4.9x^2=0 | | 3(4-x)-11=-(3x-6)-5 | | 115=10-7v | | -66=8x-2 | | 2/3x+6=7/5x+27/10 | | 12a+9-5a-3-2a-2=76 | | 12a+a-5a-3-2a-2=76 | | M=-3m-1/4+1 | | 3(x+8)2-15=255 | | 5x+332.5=2080 | | 15b-28=b | | 9-12+1=12-(3x+2) | | 9-12x+1=12-3 | | 3x2-15x+4+14=0 | | 2v2+4v+12=0 | | 3x2-15x+4+-4=0 | | −8x−(3x+6)=4−x | | -9(7.5-3y)=17.5 | | 8x-4x+5x=-31 | | F(x)=25x+0.25.G(x)=40x+0.10 | | F(x)=25x+0.25 | | 32=193/x | | -(4y+3)-(-3y-7)=-1 | | -2.3x=29.21 | | 4y+6=5y+7 | | 0.5y+7=18 | | 3(1+4v)=-27 | | -0.5x=40 | | f-6=-2f+3f(f-2) | | -(2y-4)=-4(-y+2) |