If you're looking for the product, multiply the 3 binomials which yields
x³ + 4x² + x - 6
The solution to this polynomial function:
P(x) = (x+3) (x-1)(x+2)
0 = (x+3) (x-1) (x+2)
x+3=0
x = -3
x-1 = 0
x = 1
x + 2 = 0
x = -2
The zeros of the polynomial: -3, 1, -2