计算(-2x-1)2=______;(-0.125)2008×82009=______.
题型:填空题难度:一般来源:不详
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. |
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