问题
选择题
计算:(-2)2009+(-2)2008的结果是( )
A.-22008
B.-2
C.22009
D.-22009
答案
(-2)2009+(-2)2008
=(-2)2008×(-2)+(-2)2008
=(-2)2008(-2+1)
=-22008.
故选A.
计算:(-2)2009+(-2)2008的结果是( )
A.-22008
B.-2
C.22009
D.-22009
(-2)2009+(-2)2008
=(-2)2008×(-2)+(-2)2008
=(-2)2008(-2+1)
=-22008.
故选A.