Find the lengths the missing side

Question 5 spring semester final exam math evaluate

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

In which form is the following function written? y = - 2(x – 3)(x + 5)