9a+a^2+18=0

Simple and best practice solution for 9a+a^2+18=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 9a+a^2+18=0 equation: 



9a+a^2+18=0

a = 1; b = 9; c = +18;
Δ = b2-4ac
Δ = 92-4·1·18
Δ = 9
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{9}=3$


$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(9)-3}{2*1}=\frac{-12}{2}
=-6
$


$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(9)+3}{2*1}=\frac{-6}{2}
=-3
$

See similar equations:

| 4x=85+x | | 7y-4+y+5=26 | | 3x-1x=7 | | (2x+6)+(x-9)=180 | | 2x–14=12 | | F(n)=5n+3 | | X+34+90=x+64 | | 3x-12=4+3x | | -6(2x+5)=-12x+30 | | 5-2(4x-5)=3+4(3-2x) | | 4r+8=182/3*12r | | 9=10(2+8x) | | 2a-9=(a+3)-3a | | 14.4=2.25h | | v²=47 | | 9−2x=23 | | 8x-25=3x=25 | | (2x-2)+(x+5)=36 | | 80-12=x | | 8(7n+5)=8(7n+5) | | -6(x-8)+6(-3x+5)=-66 | | r/10=-4 | | 6+0.18x=12+0.08x | | 4n-40=7(-2n+2n | | -6x-6-x=57 | | 2x+4x-5=3x+2 | | b/10=-5 | | X-1+3x-2=5 | | 5000=8x+2x | | 6(2y+3)=6 | | 8(8-7p)=2(2p+2 | | 1/2x+1/3x+10=x |

Equations solver categories