Convert x,y, and z from binary to decimal: ⇒x=(1111)2=1⋅23+1⋅22+1⋅21+1⋅20=15 ⇒y=(1001)2=1⋅23+0⋅22+0⋅21+1⋅20=9 ⇒z=(110)2=1⋅22+1⋅21+0⋅20=6 Now evaluate x3−y3−z3−3xyz 153−93−63−3×15×9×6=3375−729−216−2430=0 The result of the expression is 0 . In binary, 0 is simply (0)2.