x(x-2)-2=x+2

Simple and best practice solution for x(x-2)-2=x+2 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(x-2)-2=x+2 equation:



x(x-2)-2=x+2
We move all terms to the left:
x(x-2)-2-(x+2)=0
We multiply parentheses
x^2-2x-(x+2)-2=0
We get rid of parentheses
x^2-2x-x-2-2=0
We add all the numbers together, and all the variables
x^2-3x-4=0
a = 1; b = -3; c = -4;
Δ = b2-4ac
Δ = -32-4·1·(-4)
Δ = 25
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{25}=5$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-5}{2*1}=\frac{-2}{2} =-1 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+5}{2*1}=\frac{8}{2} =4 $

See similar equations:

| 2a-4=a+6 | | (x-2)x-2=x+2 | | 4(4w+3)/5=0 | | 4231.5=4200(1+0.25r) | | -(c-7=3 | | 4p–11=3 | | 3(3s+3)=63 | | 3(-x-20)=15 | | 4(5-c)=8 | | 4/n=-14 | | (3x5)+(4x+2)+3x=62 | | -14/4=n | | 4(x+5)=5x+5 | | 5x-13=-7x-3 | | -17-5x=14+3x | | -4x-9=6x-16 | | 8+n=160 | | -3+4x=6x-14 | | 6(3w+10)/5=-4 | | -5x+6=(-3x)-11 | | 3x^+10=11x | | 3x-19=2x-13 | | 7-2x=3x+14 | | 48-5x=3x+18 | | 2y2(4-2)=16 | | 42-4x=14+3x | | 45-7x=4x+17 | | 28-4x=12+3x | | 30+2y-10=9y-10-2y | | y/3=12* | | 30-2y-10=9y-10-2y | | 2x+3x-4x=6 |

Equations solver categories