mă puteti ajuta la acest ex va rog mult

Răspuns:
Radical27=3radical3
radical1805=19radical5
radical1620=18radical5
radical845=13radical5
radical720=12radical5
radical540=6radical15
9radical3(19radical5+18radical5-13radical5-12radical5)-24radical15=
=108radical15-24radical15=84 radical15
al doilea se face la fel
Explicație pas cu pas: