9x2+2x-8=0

Simple and best practice solution for 9x2+2x-8=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 9x2+2x-8=0 equation:



9x^2+2x-8=0
a = 9; b = 2; c = -8;
Δ = b2-4ac
Δ = 22-4·9·(-8)
Δ = 292
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:
$\sqrt{\Delta}=\sqrt{292}=\sqrt{4*73}=\sqrt{4}*\sqrt{73}=2\sqrt{73}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2\sqrt{73}}{2*9}=\frac{-2-2\sqrt{73}}{18} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2\sqrt{73}}{2*9}=\frac{-2+2\sqrt{73}}{18} $

See similar equations:

| 2(a+4)=2a-8+4a | | 9-7=7e-11 | | 29w=232 | | -(54/x)=-6 | | 4(x+2)-2x=88 | | 9w=-9+10w | | (6x-3)+(3x+15)=180 | | 2x−6=22 | | 3x+33=6x+198 | | 1x+4=3x+2 | | 2t=584 | | 3(y=41)=3y+123 | | x/x-x/6=x/12 | | 4/5b+3=7 | | 0x+4=3x+6 | | 1/2=1/3+f | | -(3x+4)=6x | | 2x−4/5=x+4 | | 1x+4=3x+6 | | (x-4)*x=2X+16 | | 5/6x+10=0 | | 6x−2(x+4)=12 | | 6+8x/2=5x | | 4(2r+3)=44 | | 1/2=1/3+r | | F(x)=-1/4x+3 | | r+6.9=-1.2 | | 16−2r=3r+1 | | 12+16x=5x | | -8+5/2m=-3 | | 5.55+.15s=7 | | -4(r+3)=-63 |

Equations solver categories