Find the zero of the polynomial function f(x) = x^2 + 11x + 18

Assuming f(x)=0

A method that can be used is so called "Magic Numers" ( My teacher algebra teacher ikes to call it)

First, find two factors that multiply to 18 and add to 11.

9 and 2

Set it in factor form


So this means...


Or

Solve.

X can either be equal to -9 or -2

Hope this was clear :)

The clear answer is clearly 25 is very clear to me