Answer:
Step-by-step explanation:
Rationalize the denominator of b. So, multiply the numerator and denominator by 

Now, find a +b

Combine like terms

Now find (a + b)²
(a +b)² = 

Hint: 
Find out how much over the 10 years whatever it says and then use that to explain if it's worth is

Factor the denominators.

Adjust fractions based on LCM.

Denominators are same, so add the fractions.

Expand the numerator.

Answer:
Rectangle.
Step-by-step explanation:
I wish I could show you on a picture.