问题
填空题
若|a|=4,则a=______;计算:-(-2)2-(-22)=______.
答案
∵|±4|=4,
∴a=±4;
-(-2)2-(-22),
=-4-(-4),
=-4+4,
=0.
故答案为:±4,0.
若|a|=4,则a=______;计算:-(-2)2-(-22)=______.
∵|±4|=4,
∴a=±4;
-(-2)2-(-22),
=-4-(-4),
=-4+4,
=0.
故答案为:±4,0.