Find ALL of the roots using the graph and synthetic division, for the following function: f(x) = x^4 +2x^3 - 11x^2 - 6x + 24​

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6