Question

the roots of the function ( f(x) = x^2 - 2x - 3 ) are shown. what is the missing number?
( x = -1 ) and ( x = square )

Explanation:

Step1: Set function to 0

$x^2 - 2x - 3 = 0$

Step2: Factor the quadratic

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

Step3: Solve for x

$x + 1 = 0 \implies x = -1$; $x - 3 = 0 \implies x = 3$

Answer:

3