9x2+5x-5=0

Simple and best practice solution for 9x2+5x-5=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+5x-5=0 equation: 



9x^2+5x-5=0

a = 9; b = 5; c = -5;
Δ = b2-4ac
Δ = 52-4·9·(-5)
Δ = 205
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-\sqrt{205}}{2*9}=\frac{-5-\sqrt{205}}{18}
$


$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{205}}{2*9}=\frac{-5+\sqrt{205}}{18}
$

See similar equations:

| -8(z-2)=40 | | 2.5x+0.1x–0.01x= | | 68=8t+12 | | 23=2c-1 | | 8=4(x-9) | | 8=4(x–9) | | 6v–14=4 | | 6y=44+11y | | (3x+6)/(x+4)=0 | | 20=3z-13 | | 6+7+8=x | | 8x-11=2×+19 | | (4x-3/7)-(x-1/4)=(2x+3/14) | | 4x-3/7-x-1/4=2x+3/14 | | Y=12.12+1.482x+2.47 | | x+5=2×-3 | | 16x-8x+2x+5=75 | | 7x+4x+2-3=10 | | 8(6x-7)=3(-5x+6)+52 | | 3(x+4)-6(3-2x)=15x-6 | | x+x/2+61=180 | | 4=(-69)+x | | |x^2-2x+3|=6 | | 2x+3•4x=24 | | |11-|x||=1 | | 8f/4=f+9 | | |x+5|+3=1 | | 1.4d-8=d+12 | | −6x−3=10 | | (x+5)+3=1 | | X+11=76(y+11) | | 12x+8=56x= |

Equations solver categories