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3(X-Y)^2-5X-2=2X-7Y-4,求X-Y的值
题目详情
3(X-Y)^2-5X-2=2X-7Y-4,求X-Y的值
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答案和解析
=>3(x-y)^2 -5x-2-2x+7y+4=0
=>3(x-y)^2 -7(x-y)+2=0
=>[3(x-y)-1][(x-y)-2]=0
=>x-y =1/3或2
=>3(x-y)^2 -7(x-y)+2=0
=>[3(x-y)-1][(x-y)-2]=0
=>x-y =1/3或2
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