计算(m^2+mn+n^2)(m^2-mn+n^2)
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计算(m^2+mn+n^2)(m^2-mn+n^2)
![计算(m^2+mn+n^2)(m^2-mn+n^2)](/uploads/image/z/19498003-43-3.jpg?t=%E8%AE%A1%E7%AE%97%28m%5E2%2Bmn%2Bn%5E2%29%28m%5E2-mn%2Bn%5E2%29)
(m^2+mn+n^2)(m^2-mn+n^2)
=(m²+n²)²-(mn)²
=m^4+2m²n²+n^4-m²n²
=m^4+m²n²+n^4
=(m²+n²)²-(mn)²
=m^4+2m²n²+n^4-m²n²
=m^4+m²n²+n^4
计算(-mn)^2×(-m^2n)^3
计算(m-n)²/2mn-m²-n²/2mn的结果是
计算(-2mn)^3(mn+1/2)(m^2n^2-1/2mn+1/4)
[(m+n)^2-4mn][(m-n)^2+4mn]+2(mn)^2
急2[mn+(-3m)]-3(2n-mn),m+n=2 mn=-3
3(m^2n+mn)-4(mn-2m^2n)+mn.
因式分解: m(m-2n)+n(2mn-m^2)
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