|x+2|=0,|y-3|=0
解得:
x=-2 y=3
负二又二分之一x=-5x/2
原式=-5x/2*5y/3+4xy
=-25xy/6+24xy/6
=-xy/6
=-(-2)*3/6
=1
已知|x+2|=0,|y-3|=0,求负二又二分之一x-三分之五Y+4XY的值
已知|x+2|=0,|y-3|=0,求负二又二分之一x-三分之五Y+4XY的值
数学人气:957 ℃时间:2019-12-13 17:06:56
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