If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-3x^2+x+15=0
a = -3; b = 1; c = +15;
Δ = b2-4ac
Δ = 12-4·(-3)·15
Δ = 181
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{-(1)-\sqrt{181}}{2*-3}=\frac{-1-\sqrt{181}}{-6} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{181}}{2*-3}=\frac{-1+\sqrt{181}}{-6} $
| 1/8=3/2x | | -51=a/2+15 | | 2(x–5)=–11 | | 3x-5x=-14 | | 4-5+6m=5(15-4m) | | 10+8(2x+4)=8-4 | | 20–15z+17=-12z–20 | | -20+c=20–4c | | n/25=4/100 | | -1x-9=11 | | X2-18x=2 | | 11p+11+6p=19p+17 | | 1/3y-19=-21 | | n/10=10/100 | | 5x-6=5x+8 | | 24=-6v+4(v+3) | | -2(x-6)=-2x-6 | | 13-5xx=4 | | 4(5h+3)=12 | | 5(x+7)+2=-11(x-6)-6 | | -6u+3(u-2)=9 | | 11+16+x/3=15 | | 5(x+3)+4=-4(x-2)-3 | | 9(x+7)+4=-4(x-1)-10 | | 8x+10=2x+10 | | 10+5x=10-x3 | | 9(x−7)=99 | | 4(x-5)=5(x+11) | | 4^x-2=16384 | | 7/3v=35 | | 2x-24x=6 | | 7(×+4)+2=-11(x-3)-7 |