(m+n)^2-(2m-n)(2m+n)+(2m+n)^2如何因式分解
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(m+n)^2-(2m-n)(2m+n)+(2m+n)^2如何因式分解
(m+n)^2-(2m-n)(2m+n)+(2m+n)^2如何因式分解
(m+n)^2-(2m-n)(2m+n)+(2m+n)^2如何因式分解
(m+n)^2-(2m-n)(2m+n)+(2m+n)^2
=(m+n)²+(2m+n)(2m+n-2m+n)
=m²+2mn+n²+2mn+2n²
=m²+4mn+3n²
=(m+3n)(m+n)
(m+n)²-(2m-n)(2m+n)+(2m+n)²=(m+n)²+[(2m+n)²-(2m-n)(2m+n)]=(m+n)²+(2m+n)[(2m+n)-(2m-n)]=(m+n)²+2n(2m+n)=m²+4mn+3n²=(m+n)(m+3n)
(m+n)^2-2(m+n)(2m+n)+(2m+n)^2
=(m+n-2m-n)²
=(-m)²
=m²
(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
(m-2n)(-m-n)
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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(m-n)+2n(m-n)(m-n)的平方+2n(m-n)因式分解
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
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分式加减法:化简:2m/m-n-n/n-m+m+2n/n-m
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