Find the x- and y-intercepts of the following polynomial functions: (with a graph po)

1. y = x + 3x2 - X-3
2. y = x3 - 7x + 6
3. y = x4 – x2 + 2x3 - 2x
4. y = x3 - 4x2 + x + 6
5. y = -x(x - 2)(x - 2)(x - 3)​