mohon penjelasan Nomor 6.

4a-√4 / 4-4 = 3/4
4a-2 / 0 = 3/4
4(4a-2) = 3(0)
16a-8 = 0
16a = 8
a = 8/16

a+2= 8/16 + 2/1
     = 8/16 + 32/16
     = 40/16
     =2,5
     = 3