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 equal to 0

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

Step2: Factor the quadratic equation

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

Step3: Solve for x

Set each factor to 0:
$x + 1 = 0 \implies x = -1$
$x - 3 = 0 \implies x = 3$

Answer:

$3$