Respuesta :

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

BloodFire101

Answer:

x^2+x-20

Step-by-step explanation:

(x-4)(x+5)

=x^2-4x+5x-20

=x^2+x-20

Hope This Helped