Respuesta :

She made the mistake on the second line.

2x^2-x+3=-3x+3
2x^2+2x=0
(when bringing a number to the other side you must always flip the sign. If the number was positive, make it negative on the other side)
2x(x+1)

2x=0
x+1=0
x=-1, 0

Hope that helps!