Exercise $6$ Using the three methods: symbolic, conv, and poly, expand the following polynomials.

$p_1=20(s+2)(s+3)(s+6)(s+8)$

$p_2=s(s+7)(s+8)(s+5)$

$p_3=s^2(s^2+8s+15)$

Matlab code and answers: Matlab Results obtained after using each method.

Method $1$ results: