若[-3(x+y)m(x-y)2n]2•[-(x+y)2]=-9(x+y)10(x-y)12-n,求m、n的值.
若[-3(x+y)m(x-y)2n]2•[-(x+y)2]=-9(x+y)10(x-y)12-n,求m、n的值.
数学人气:698 ℃时间:2020-05-26 12:02:23
优质解答
∵[-3(x+y)
m(x-y)
2n]
2•[-(x+y)
2]=-9(x+y)
2m+2(x-y)
4n=-9(x+y)
10(x-y)
12-n,
∴2m+2=10,4n=12-n,
解得m=4,n=
.
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