384=2x(x-4)

Solution for 384=2x(x-4) equation:

384=2x(x-4)

We move all terms to the left:

384-(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

-2x^2+8x+384=0

a = -2; b = 8; c = +384;
Δ = b2-4ac
Δ = 82-4·(-2)·384
Δ = 3136
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{3136}=56$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(8)-56}{2*-2}=\frac{-64}{-4}
=+16
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(8)+56}{2*-2}=\frac{48}{-4}
=-12
$