x^2+7x-66=0

Simple and best practice solution for x^2+7x-66=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 x^2+7x-66=0 equation: 



x^2+7x-66=0

a = 1; b = 7; c = -66;
Δ = b2-4ac
Δ = 72-4·1·(-66)
Δ = 313
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{-(7)-\sqrt{313}}{2*1}=\frac{-7-\sqrt{313}}{2}
$


$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+\sqrt{313}}{2*1}=\frac{-7+\sqrt{313}}{2}
$

See similar equations:

| 8=w+14 | | (4c-2)/3=8 | | 5/7x-3=1/7x+9 | | 5m+7=2m | | 2y^2-19y+24=0 | | 4+4n=7n+4 | | 2x+10/6=36 | | 5x2=11x | | 5u-8u-4=0 | | 4x+9x-19=76-6x | | 6p=-20 | | 2x(2x+1)=12 | | X^+5x-13=0 | | 0.12x+39.95= | | 4(2x+3)=2(3x+2)+(2x+1) | | 36n^2=25 | | x-2/12=5/9 | | Y=-1/3x+8 | | 2x+5/2=20 | | 28f+21f=42f+14f | | 2.4+10m=8.18 | | X-2+4=x | | 3x-12=2x+1 | | 0=-5x^2+26x+24 | | 2x+17=41 | | 8+6q=10+5q | | 3x+50=3x+1000 | | 14=n/21 | | 7+a=19;a=12 | | w-11=4.1 | | x-1/2=x-2/4 | | 4π=w-6π |

Equations solver categories