Question 399467
I need help mulitplying this problem. I dont know how to set it up and show my work. 

multiply:

(a-2/5)(a+5/2)


use FOIL, First Outer Inner Last
(a - 2/5)(a + 5/2)
a^2 + (5/2)a - (2/5)a - 1
a^2 + (25/10)a - (4/10)a - 1 (common denominators)
a^2 + (21/10)a - 1