Question

Ex 2,3 de la operatii cu numere intregi 20 puncte+coronita.Va rog am nevoie de ajutor

Answer 1

$2. (-2)^{2} *(-2) ^{3} =(-2) ^{2+3} =(-2)^{5} \\ (-5)^{7} *(-5)^{9} =(-5) ^{7+9} =(-5)^{16} \\ (-3)^{4} :(-3)^{3} =(-3)^{4-3}=(-3) \\ (-5) ^{36}:(-5) ^{28} =(-5)^{36-28} =(-5)^{8} \\ (-14) ^{14}:(-14)^{12}:(-14)=(-14) ^{14-12-1} =(-14 )^{1} =(-14) \\ (6)^{9}:(-6)^{8} =(6) ^{9-8} =6^{1}=6 \\ (-8)^{4}*8 ^{2}=(8)^{4+2} =(8)^{6} \\ 3.16* 2^{5} =2^{4}* 2^{5} = 2^{4+5}= 2^{9} \\ (-3)^{4} *(-3)^{9}:(-81)= \\ (-3)^{4} *(-3)^{9}:(-3)^{4} = (-3)^{4+9}:(-3) ^{4} = \\ (-3)^{13}:(-3) ^{4} =(-3)^{13-4} =(-3)^{9}$