a + x^2 + 9x + 5 + 3x^3 + 2x^2 - 7x + 2 = 3x^3 + 6x^2 + 11x + 8
P = 3x^3 + 6x^2 + 11x + 8
a + b + c = P
a = ?
b = x^2 + 9x + 5
c = 3x^3 + 2x^2 - 7x + 2
