化简(2分之1)的-3次方×0.25+2012-6(x+3)²-(x-1)(x-2),其中x=-1
问题描述:
化简(2分之1)的-3次方×0.25+2012-6
(x+3)²-(x-1)(x-2),其中x=-1
答
-7X的平方-33X+1958
答
(2分之1)的-3次方×0.25+2012-6
=2³×0.25+2006
=2008
(x+3)²-(x-1)(x-2)
=x²+6x+9-(x²-3x+2)
=9x+7
当x=-1时
原式=-9+7=-2
答
(2分之1)的-3次方×0.25+2012-6
=1/(1/2)³×1/4+2012-6
=8×1/4+2006
=2008
(x+3)²-(x-1)(x-2)
=x²+6x+9-(x²-3x+2)
=x²+6x+9-x²+3x-2
=9x+7
=-9+7
=-2
答
(2分之1)的-3次方×0.25+2012-6
= 8×0.25+2012-6
= 2+2012-6
= 2014-6
=2008
(x+3)²-(x-1)(x-2),
= x² +6x +9 -x² +3x -2
=9x +7
当x= -1时
原式= -9+7
=-2
秋风燕燕为您答题 O(∩_∩)O
有什么不明白可以对该题继续追问
如果满意,请及时选为满意答案,谢谢