2x(3xy + 4y² + 8y)

6x²2xy + 2x4y² + 2x8y
12x² + 10y²

2 answers

What exactly are your instructions here?
What is this?
Are you expanding 2x(3xy + 4y² + 8y) ?

Then it would simply be

= 6x^2 y + 8x y^2 + 16xy

What you did is pure mathematical gibberish