化简并求值2(2x-3y)-3(4x+2y-1),其中x=2,y=0.5
人气:420 ℃ 时间:2019-08-19 15:09:36
解答
最简式
-8x-12y+3
值=-8*2-12*0.5+3=-16-6+3=-19
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