Question

let f(x)=x^3+2x^2+3x+1 and g(x)=4x-5 find f(x)*g(x)

Answer 1

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