help me with this

Use the FOIL method on this. So, (1/a*a/a)+(1*1/a)+(1*a/a)+(1*1). This gives you a/a ²+1/a+a/a+1. 1/a+a/a can be written as a+1/a. This can be reduced to 1/a[since a/a is equal to 1]+(a+1/a)+1. You cannot reduce this any further.

a/a = 1
=> (a/a+1) = 2
=> (1/a + 1)*(a/a + 1) = (1/a + 1)*2 = 2/a + 2