Respuesta :

Distributive property.

[tex]a(b+c)=ab+ac[/tex]

[tex](a+b)(c+d)=a(c+d)+b(c+d)=ac+ad+bc+ad[/tex]

[tex](a+b+c)(d+e)=a(d+e)+b(d+e)+c(d+e)=ad+ae+bd+be+cd+ce[/tex]

and so on.