Very Easy question, but I wasn't actively doing the question and I got it wrong. I was looking at it & didn't know which step was wrong? It looked like all the individual steps are correct but the final solution is wrong.
I'm fully aware the solution is wrong & that if I plug the "roots" back in its wrong.
$$ 3x^2 - 6x - 9 = 0 $$ $$ 9 = 3x(x-2) $$ $$ x_1 = \frac{3}{9} \qquad x_2 = 11 $$
I should have factored etc etc, but I'm curious to know which step is incorrect & why.