Divide (x^2+9x+20)/(x+5)

Consider the form ${\displaystyle x^2+bx+c}$. Find a pair of integers whose product is ${\displaystyle c}$ and whose sum is ${\displaystyle b}$. In this case, whose product is ${\displaystyle 20}$ and whose sum is ${\displaystyle 9}$.

Write the factored form using these integers.

Cancel the common factor.

Divide ${\displaystyle x+4}$ by ${\displaystyle 1}$.