If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-5x^2-13x+12=0
a = -5; b = -13; c = +12;
Δ = b2-4ac
Δ = -132-4·(-5)·12
Δ = 409
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{-(-13)-\sqrt{409}}{2*-5}=\frac{13-\sqrt{409}}{-10} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-13)+\sqrt{409}}{2*-5}=\frac{13+\sqrt{409}}{-10} $
| c+.05c=45 | | 8.4x=142.8 | | 11q=20q+18 | | 6(x+4)=4+6x+20 | | 5+k=18 | | x×3+7=43 | | -40x+18-20x+3+15x+9=180 | | 5x-2/x=6 | | 49x^2-(4x-25)^2=0 | | 60=5f | | 4x-10+x+14+x+26=180 | | 3x/2-4=10 | | 1c=16-4c+8 | | 6h=42+h | | 7x+11+2x+2+4x-28=190 | | (x+2)(x+3)=(x-3)(x-2)-2x(x+1)=0 | | 5x=-2=3x+4 | | 3a+24=6a+24-3a | | 30x+10=50 | | 16=-3p-8 | | 280=136-x | | 6-3c/2=4c-6/5 | | 8=20−4m | | 7v-3=67 | | 8h^2−3h−1=0 | | 7v−3=67 | | 2x+4+2x-2+x-2=180 | | y=7/2*0-2 | | 5-(y-2)=-4y-1 | | y=7/20-2 | | (3-x)(5x+8)=0 | | n+9=9n+24 |