Polynominals problem

Polynominals are not cool

A(x) + B(x) = 3x^3 - 2x^2 + (a-8)x + (9+b)
A(x) - B(x) = x^3 + (a+8)x + (9-b)

a) Find A(x) and B(x)

How do I solve this /sci/?

Gaussian elimination

A(x) = [3x^3 - 2x^2 + (a-8)x + (9+b) + x^3 + (a+8)x + (9-b)] / 2

Simplify, solve for B(x)

add them together numbnuts.