Find the polynomial expression given the following factors:

Find the polynomial expression given the following factors:

1. (𝑥 + 3)(𝑥 − 2)(𝑥 + 2)(𝑥 + 4)

>> r = [-3 2 -2 -4];
>> p = poly(r)

p =

     1     7     8   -28   -48

Is this correct? I don't know how I can make the given into a proper polynomial expression. Also the 'syms' doesnt work on my matlab version which is R2019a.

Answer 1

[Dyuman Joshi]

It is correct.

syms x
expand((x+3)*(x-2)*(x+2)*(x+4))

ans = 

You can also use sym2poly if you have the symbolic toolbox to convert syms variable into coefficients.

P.S - And syms should work in R2019a