16(2m+n)^2-9(m-2n)^2kuai
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16(2m+n)^2-9(m-2n)^2kuai16(2m+n)^2-9(m-2n)^2kuai16(2m+n)^2-9(m-2n)^2kuai16(2m+n)^2-9(m-2n)^2=(8m+4n)
16(2m+n)^2-9(m-2n)^2kuai
16(2m+n)^2-9(m-2n)^2
kuai
16(2m+n)^2-9(m-2n)^2kuai
16(2m+n)^2-9(m-2n)^2
=(8m+4n)^2-(3m-6n)^2
=(8m+4n-3m+6n)(8m+4n+3m-6n)
=5(m+2n)(11m-2n)
(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
(m-2n)(-m-n)
4m^2(m+n)-9n^2(m+n)
(m-n)^9乘(n-m)^8/(m-n)^2
m-n+2n^2/(m+n)
(m-2n/n-m)-(n/m-n)=
2(m-n)²-m(m-n)
(m-n)(m+n)+(m+n)²-2m²
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因式分解:(2n-m)^2-6(2n-m)(m+n)+9(m+n)^2
(3m-2n)^+(3m+2n) (3m-2n)-9(m+n)^
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