Chapter 4 Quadratic Functions and Factoring - 4.10 Write Quadratic Functions and Models - 4.10 Exercises - Skill Practice - Page 312: 18

$y=(x+6)(x+4)$

We already know $y$, $x$, $p$ and $q$ from the given x-intercepts and the point, so in order to get the quadratic function we need to find $a$... $y=a(x-p)(x-q)$ $3=a(-3+6)a(-3+4)$ $3=3a$ $a=\frac{3}{3}$ $a=1$ Therefore the functions is... $y=(x+6)(x+4)$