If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2+15x-398=0
a = 1; b = 15; c = -398;
Δ = b2-4ac
Δ = 152-4·1·(-398)
Δ = 1817
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{-(15)-\sqrt{1817}}{2*1}=\frac{-15-\sqrt{1817}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(15)+\sqrt{1817}}{2*1}=\frac{-15+\sqrt{1817}}{2} $
| x=40+-1.6 | | 3t+5=47 | | 2x−3(x+4)=−2(x−7)−202x-3(x+4)=-2(x-7)-20 | | 9w-4=138-16w+8 | | 7v-9+18v-15=126 | | 7(9c-1)-18=61c+7 | | F(x)=|x+3| | | -56=7u-35-12u-24 | | 7v-42v-49=0 | | S^3+4s^2+4s+15=0 | | 42=63w-21+18w-18 | | 0=(2(x^-1/2))-(3(x^-1/2)) | | x3-x=1320 | | 1/((1/a)+(1/60))=25 | | 7y+21=-3+y | | 2w^+5w-42=0 | | 6v+6-7v-5=4 | | (x*x)+60x=350 | | 2.9=-2b+4.1;0.5,0.6,0.7 | | 6(x-7)-4(x+5)=-1 | | 3x–11x+x=-14 | | 14=12-q | | 12k+4.5=k+14 | | 17=-8x+57 | | 6x2-13x+5=0 | | 2/3(x-6)-1/4(x-8)=9/4 | | 1.1x+0.67=0.341.1x+0.67=0.34 | | 1/2x+8=1/9x | | 15-(6k/7)=8 | | 15/m=3 | | 15÷m=20 | | 1/2y+8=1/9y |