(x+4)(x+8)=2x(x+4)

Solution for (x+4)(x+8)=2x(x+4) equation:

(x+4)(x+8)=2x(x+4)

We move all terms to the left:

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

We multiply parentheses ..

(+x^2+8x+4x+32)-(2x(x+4))=0


We calculate terms in parentheses: -(2x(x+4)), so:

2x(x+4)

We multiply parentheses

2x^2+8x

Back to the equation:

-(2x^2+8x)


We get rid of parentheses

x^2-2x^2+8x+4x-8x+32=0

We add all the numbers together, and all the variables

-1x^2+4x+32=0

a = -1; b = 4; c = +32;
Δ = b2-4ac
Δ = 42-4·(-1)·32
Δ = 144
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{144}=12$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-12}{2*-1}=\frac{-16}{-2}
=+8
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+12}{2*-1}=\frac{8}{-2}
=-4
$