One of the factors of the polynomial x3 + 5x2 + 6x is (x2 + 3x). What is the other factor? x − 2 x + 2 x + 1 x − 1

to find the other factor you are going to need to divide the polynomial by the factor it gave
[tex]( {x}^{3} + 5 {x}^{2} + 6x) \div ( {x}^{2} + 3x)[/tex]

I do not have a pen and paper nearby to explain how to divide polynomials but if you leave a comment saying you don't know how I will explain it to you.
after dividing you get the answer x+2