If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x*x+2*x-15=0
We add all the numbers together, and all the variables
2x+x*x-15=0
Wy multiply elements
x^2+2x-15=0
a = 1; b = 2; c = -15;
Δ = b2-4ac
Δ = 22-4·1·(-15)
Δ = 64
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{64}=8$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-8}{2*1}=\frac{-10}{2} =-5 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+8}{2*1}=\frac{6}{2} =3 $
| 16+c=-4 | | -7=4h | | 51/4-37/8=x/x | | 8n-6=73 | | x*5-13=47 | | 15=-5/6x+5 | | 7x+30=2x | | 10=2/3x+4 | | 5=-5a+5 | | w+(-9)=3 | | c+35/6=33/4 | | 3-2(x-5)=1 | | -(9/5)x=-45 | | x+2=3/2x-5/4 | | a+2=9.2 | | c+55/6=81/4 | | 3x+-(8x+-2x)-(-x+(-5x-3)+2)=405.6 | | 3(x+2)+x=-10 | | -8(y+5)=9y+45 | | -4x-12=5x+9 | | -2(y+6)=12 | | 2a+2=9.2 | | 5x-28=2(x+1) | | 4x64x^=1 | | -4(v+1)=-2v-20 | | (w+5)^2=2w^2+15w+31 | | 2k+26=-125 | | 5(x+9)=5×+45 | | X^2+10x-1080=0 | | 2/3(5-k)=7 | | m÷2=4.8 | | (a/2)+2=9.2 |