Question

Teman teman semua bantu sayaa....
bantu nomor 21 pilih saja yg anda bisa nonor a/b/c

Answer 1

21.
a) x+y
= (1/6+2√3) + 1/(6-2√3)

= 1.(6-2√3) + 1.(6+2√3)
_____________________
(6+2√3).(6-2√3)

= 6-2√3 + 6+2√3
______________
(6+2√3).(6-2√3)

= 6+6-2√3+2√3
_____________
36-4.3

= 12 / 36-12
= 12 / 24
= 1/2