If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x(x+8)=-13
We move all terms to the left:
x(x+8)-(-13)=0
We add all the numbers together, and all the variables
x(x+8)+13=0
We multiply parentheses
x^2+8x+13=0
a = 1; b = 8; c = +13;
Δ = b2-4ac
Δ = 82-4·1·13
Δ = 12
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{12}=\sqrt{4*3}=\sqrt{4}*\sqrt{3}=2\sqrt{3}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-2\sqrt{3}}{2*1}=\frac{-8-2\sqrt{3}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+2\sqrt{3}}{2*1}=\frac{-8+2\sqrt{3}}{2} $
| x+(-21/2)=-31/2 | | -11n-19=-10n | | -8(1-2x)=4 | | 3(2y+4)/14=1 | | 8n^2-56n=0 | | x+1=-x+-5 | | x+1,5x+2x=10 | | 5x−7=3 | | x^2+216/X=0 | | 18=6(5-g | | x+1=–x+-5 | | 6(y+4)+3(y-3)=15 | | -28X17x=207 | | 39y+295=33y-350 | | 25=6t-17 | | 3n-7=4 | | 2(x-7)=5(x+8)-x | | -21=5-4x-2 | | -21=4-4x-2 | | 2+7x=2(20x+27)+x | | 295y+33=350y-39 | | 9−3f=3 | | 3x^2-12+10=0 | | 295+33=350y-39 | | 3(7x-2)+2=-27 | | a/7/8=25/100 | | 5x+23=−2x−19 | | 3x+4/2=95 | | -12+3x=4(20x+23)+x | | 1/3x+51/2=61/2 | | 54=-7t-2 | | 3(4w+4)/5=4 |