Answer:
[tex]x^2+x-20[/tex]
Step-by-step explanation:
1) Use the FOIL method: [tex](a+b)(c+d)=ac+ad+bc+bd.\\[/tex]
[tex]x^2+5x-4x-20[/tex]
2) Collect like terms.
[tex]x^2+(5x-4x)-20[/tex]
3) Simplify.
[tex]x^2+x-20[/tex]
What is the FOIL method
It stands for:
First, Outside, Inside, Last
