3) ?? ???? = ?? ?? ???? X = ?v? ?? ?? ?? = ?? ?? ?? ???? s.s = Ø 4) 64 ???? - ?? = -???? 64 ???? = -27 X = ?v? -???? = -?? ???? ?? s.s = Ø 5) 2 ???? - ?? = ?? 2 ???? = 10 X = ?v? ?? s.s = { ?v? ?? } 1ST TERM MATH-PREP.2 11 | P a g e