5a^2+9a-18=0

Simple and best practice solution for 5a^2+9a-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 5a^2+9a-18=0 equation: 



5a^2+9a-18=0

a = 5; b = 9; c = -18;
Δ = b2-4ac
Δ = 92-4·5·(-18)
Δ = 441
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{441}=21$


$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(9)-21}{2*5}=\frac{-30}{10}
=-3
$


$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(9)+21}{2*5}=\frac{12}{10}
=1+1/5
$

See similar equations:

| s-4=-9 | | 2x=10² | | 3(0)-6y=-45 | | 3(-3x-1)=24 | | x÷1⁄2=2/8 | | 1.6•n=5 | | 5=c+6 | | 12.75=11+c/4 | | 8x-(23x+6-8=0 | | 6+8(x-1)=2(3x=4) | | 1.5(2x+5)+2.5+1.5(−2x+7)=0.5 | | 13=-6+v | | 8=10(0.95x) | | 1y+-3=-77 | | 13x-2+133=180 | | 7x^2-35x-168=0 | | f/29=–4 | | b+222=887 | | 2xx=52 | | -6=x–20 | | -15=3/7b= | | 5h+8+9h=10 | | 7x^2-35-168=0 | | b/14=28 | | a/4+7=3 | | 1/4(8x-12)+4x=9-1/2(4x+8x) | | –22t=–462 | | 18=3k−3 | | 5+(0.50*x)=11.50 | | 29=u/7 | | 2x+2+56= | | –2+d=3d+10 |

Equations solver categories