Multiply
(b + (1)/(5)) (b + (1)/(3))
Simplify your answer
I assume that you mean
[b + (1/5)]*[b + (1/3)]
That would be
b^2 + (8/15)b + 1/15
(b + (1)/(5)) (b + (1)/(3))
Simplify your answer
[b + (1/5)]*[b + (1/3)]
That would be
b^2 + (8/15)b + 1/15