Answer:
a² + 2ab + b² + ac + bc
Step-by-step explanation:
(a + b + c) * (a + b) = aa + ab + ac + ba + bb + bc
= a² + 2ab + b² + ac + bc
The trick you use here is called the distributive property.
Answer:
[tex]a^2+b^2+2ab+ac+bc[/tex]
Step-by-step explanation:
[tex](a+b+c(a+b)=\\a^2+ab+ac+ab+b^2+bc=\\a^2+b^2+ab+ab+ac+bc=\\a^2+b^2+2ab+ac+bc[/tex]
