Ireally need with this! fast, you: )

Which matrix can be multiplied to the left of a vector matrix to get a new vector matrix ?

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial