Answer: f(x)*g(x)= 4x^4-x^3+7x^2-11x-5
Step-by-step explanation: I usually just split the expression into terms but you're welcome to solve it the vertical way.
4x(x^3+x^2+3x+1) = 4x^4+4x^3+12x^2+4x = A
-5(x^3+x^2+3x+1) = -5x^3-5x^2-15x-5 = B
Add A and B together.
4x^4-x^3+7x^2-11x-5
