(x+8/2)(x-2)=0

Solution for (x+8/2)(x-2)=0 equation:

(x+8/2)(x-2)=0


Domain of the equation: 2)(x-2)!=0

x∈R


We add all the numbers together, and all the variables

(x+4)(x-2)=0

We multiply parentheses ..

(+x^2-2x+4x-8)=0

We get rid of parentheses

x^2-2x+4x-8=0

We add all the numbers together, and all the variables

x^2+2x-8=0

a = 1; b = 2; c = -8;
Δ = b2-4ac
Δ = 22-4·1·(-8)
Δ = 36
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{36}=6$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-6}{2*1}=\frac{-8}{2}
=-4
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+6}{2*1}=\frac{4}{2}
=2
$