6radical18 plus 12radical8-11radical32? vreau si explicatie

Răspuns :

Scoatem factori de sub radical

√18 = 3√2

√8 = 2√2

√32 = 4√2

6×3√2 + 12×2√2 - 11×4√2 =

18√2 + 24√2 - 44√2 = (18 + 24 - 44)√2 = (42 - 44)√2 = - 2√2