(8+√12)² tolong bantu

(8+√12)² = (8+√12) (8+√12) 
               = (8+√4x3) (8+√4x3)
               = (8+2√3) (8+2√3)
               = (10√3) (10√3)
               = (100√9)
               = 100+3
               = 103

maaf kalo salah