(-2)^100+(-2)^101
=(-2)^100(1-2)
=-2^100
(-2)100 +(-2)101=(-2)100 〔1+ (-2)〕=-1002
0
(-2)^100+(-2)^101
=(-2)^100(1-2)
=-2^100
(-2)100 +(-2)101=(-2)100 〔1+ (-2)〕=-1002