2а(а+b)-y(a+b)=? Помогите по алгебре

Question

2а(а+b)-y(a+b)=?
Помогите по алгебре

Answer 1

2a(a+b)-y(a+b) = 3a+2ab-ya-yb = 3a+2a+2b-ya-yb = 5a+2b-ya-yb

Answer 2

2а(а+b)-y(a+b)=2a•a+2a•b-y•a+y•b