(x+9)(x-11)/(x+7)=0

Simple and best practice solution for (x+9)(x-11)/(x+7)=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+9)(x-11)/(x+7)=0 equation:



(x+9)(x-11)/(x+7)=0
Domain of the equation: (x+7)!=0
We move all terms containing x to the left, all other terms to the right
x!=-7
x∈R
We multiply parentheses ..
(+x^2-11x+9x-99)/(x+7)=0
We multiply all the terms by the denominator
(+x^2-11x+9x-99)=0
We get rid of parentheses
x^2-11x+9x-99=0
We add all the numbers together, and all the variables
x^2-2x-99=0
a = 1; b = -2; c = -99;
Δ = b2-4ac
Δ = -22-4·1·(-99)
Δ = 400
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{400}=20$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-2)-20}{2*1}=\frac{-18}{2} =-9 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-2)+20}{2*1}=\frac{22}{2} =11 $

See similar equations:

| (2x-5)-(3x^2-7x+5)=0 | | I/2+1=7x-14 | | v=48-7v | | 8/2b=21 | | 5n-2=2+10 | | (6x+8)=(8x-5) | | 7•(x-4)=5•(x-2) | | 8x=8x-10-2 | | 0.1=(100+x) | | 84=(4x+2)6x | | 80000*(6*x)=120000 | | 80000^(5x)=120000 | | 7-6y=37 | | x+(0.1765)(X)=10000 | | (80)*(6x)=120 | | 80000*(5x)=120000 | | 3(2x+1)-x+4=6x+2 | | x+(0.1765)(x)=9523.8 | | x+(0.05)(X)=10000 | | -29(2x-86)=-(-28x-1204) | | 6(x-4)=2(x-20) | | 10-r/3=-2 | | -20x-10=-10-13x | | 7(x-13)=-161 | | 6(x-4)=2(x-20 | | -29(2x-86)=-(-28x-1204 | | 13(x-10)=104 | | -3(x-8)=5(x-16) | | 16x-2=47+9x | | 13x-9=24 | | 25=4/x^2 | | -44x+-6+x=-12 |

Equations solver categories