If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2s^2+s-15=0
a = 2; b = 1; c = -15;
Δ = b2-4ac
Δ = 12-4·2·(-15)
Δ = 121
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$s_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$s_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{121}=11$$s_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-11}{2*2}=\frac{-12}{4} =-3 $$s_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+11}{2*2}=\frac{10}{4} =2+1/2 $
| 6x+8=79 | | 4-(x÷6)=-16 | | s^2+s-15=0 | | 2y-6y-5y=-3y+6 | | 1/x=1/68 | | x=39+-2 | | 1/(x-1)+2/(x^2+1-2x)=1 | | 11x-3=6x+5 | | 3x+4+6=x+9-3 | | 1/3x+3/4-5/6x+2=1/5x-3 | | 2a-6(a-4=-4 | | 4+88y=56 | | 2(s+5)=16 | | 3(y+3)=-2y+29 | | -2m+8m-8=-2 | | 2+w/3=-13 | | (8x-9)(-x+3)=0 | | 62=5v-13 | | 15=12b-3b | | -2m+8m-8=7m-2m | | -31=4u-3 | | -6(1-5)+2y=58 | | 5(2x+3)=14-5 | | 3x-3+x+7=180 | | 11y-3y=24 | | 237=-x+58 | | 12x-(4x-2)=66 | | 5nX18=100 | | 4y/5-7=-3 | | -6v+4(v-4)=-36 | | 8x(-x+6)=0 | | 4(3z+1)-6=70 |