Please help asap. (will give brainliest)

Ineed in figuring out this problem.

Axel follows these steps to divide 40 by 9: start with 40. 1. divide by 9 and write down the remainder. 2. write a zero after the remainder. 3. repeat steps 1 and 2 until you have a remainder of zero. examine his work, and then complete the statements below.

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?