问题
填空题
计算(-2x-1)2=______;(-0.125)2008×82009=______.
答案
(-2x-1)2
=(-2X)2-2(-2x)×1+12
=4x2+4x+1;
(-0.125)2008×82009
=(-0.125)2008×82008×8
=(-0.125×8)2008×8
=(-1)2008×8
=8.
故答案分别为:4x2+4x+1,8.
计算(-2x-1)2=______;(-0.125)2008×82009=______.
(-2x-1)2
=(-2X)2-2(-2x)×1+12
=4x2+4x+1;
(-0.125)2008×82009
=(-0.125)2008×82008×8
=(-0.125×8)2008×8
=(-1)2008×8
=8.
故答案分别为:4x2+4x+1,8.