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m²-1+4mn+4n²等于几
人气:147 ℃ 时间:2020-02-05 01:42:03
解答
m²-1+4mn+4n²
=(m²+4mn+4n²)-1
=(m+2n)²-1
=(m+2n+1)(m+2n-1)
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若m>n>0,m2+n2=4mn,则m2−n2mn的值等于_.
1+n-m/m+2n÷m²-n²/m²+4mn+4n²=
设n≠0,m2+4n2=4mn,则m2−n2mn=_.
1+n-m÷m²-n² --- ---- m+2n m²+4mn+4n²
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