Calculation: (- a 2 / 4) + (2-A 1 / 4)

Calculation: (- a 2 / 4) + (2-A 1 / 4)

2a of (A-4) + 1 of (2-A)
=2a/(a-2)(a+2)-1/(a-2)
=(2a-a-2)/(a-2)(a+2)
=(a-2)/(a-2)(a+2)
=1/(a+2)