The graph of y=x3+3x2\displaystyle {y}=-{x}^{{3}}+{3}{x}-{2} is shown below.
Estimate the solution(s) to the equation x3+3x2=4\displaystyle -{x}^{{3}}+{3}{x}-{2}=-{4}.

1234-1-2-3-41234567891011-1-2-3-4-5-6-7-8-9-10-11

Enter solution(s) in the box below. If there is more than 1 solution, separate the values with a comma (example: -3, 2, 4.5).