Chapter 8, Problem 14P

Write a user-defined function that multiplies two polynomials. Name the function p = polyinult (p1, p2). The two input arguments p1 and p2 are vectors of the coefficients of the two polynomials. The output argument p is the resulting polynomial.

Use the function to multiply the following polynomials:

$f_1\left(x\right)=2x^6-3x^4-9x^3+11x^2-8x+4$ and $f_2\left(x\right)=5x^3+7x-10$

Check the answer with MATLAB’s built-in function conv.