Question

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

Answer 1

Thank you for asking this question, here is your answer:

x^2 -2x -3 = 0

(x-3)(x+1) = 0

x+1 = 0

x = -1

x - 3 = 0

x = 3  

So that means the missing number is 3, if there is any confusion please leave a comment below.