Divide x^2-20+x entre 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 ${\displaystyle 1}$.

Write the factored form using these integers.

Cancel the common factor.

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