The answer is (b+2)(a+3)
You have to group each like term but have them be able to separate evenly so when you do the foil method it goes back to the original equation.
Answer:
1/4000
1 milimeter on paper means 4000 in real
1.B
2.e
3.8+10(x+3)+x
8+10x+30+x
11x=-30-8
x=38+11x