已知m+2n=3,m-2n=1,则代数式16m²n²-(m²+4n²)²的值为()不能先把m和n求出来,要用整体思想
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/21 18:06:26
![已知m+2n=3,m-2n=1,则代数式16m²n²-(m²+4n²)²的值为()不能先把m和n求出来,要用整体思想](/uploads/image/z/5294131-43-1.jpg?t=%E5%B7%B2%E7%9F%A5m%2B2n%3D3%2Cm-2n%3D1%2C%E5%88%99%E4%BB%A3%E6%95%B0%E5%BC%8F16m%26%23178%3Bn%26%23178%3B-%EF%BC%88m%26%23178%3B%2B4n%26%23178%3B%EF%BC%89%26%23178%3B%E7%9A%84%E5%80%BC%E4%B8%BA%28%29%E4%B8%8D%E8%83%BD%E5%85%88%E6%8A%8Am%E5%92%8Cn%E6%B1%82%E5%87%BA%E6%9D%A5%2C%E8%A6%81%E7%94%A8%E6%95%B4%E4%BD%93%E6%80%9D%E6%83%B3)
已知m+2n=3,m-2n=1,则代数式16m²n²-(m²+4n²)²的值为()不能先把m和n求出来,要用整体思想
已知m+2n=3,m-2n=1,则代数式16m²n²-(m²+4n²)²的值为()
不能先把m和n求出来,要用整体思想
已知m+2n=3,m-2n=1,则代数式16m²n²-(m²+4n²)²的值为()不能先把m和n求出来,要用整体思想
16m²n²-(m²+4n²)²
=(4mn+m²+4n²)(4mn-m²-4n²)
=-(m+2n)²(m-2n)²
=-9×1
=-9
16m²n²-(m²+4n²)²=(4mn+m²+4n²)(4mn-m²-4n²)
=—(m+2n)²(m-2n)²
=-9X1
...
全部展开
16m²n²-(m²+4n²)²=(4mn+m²+4n²)(4mn-m²-4n²)
=—(m+2n)²(m-2n)²
=-9X1
=-9
收起
已知m-2n/2m+n=5,求代数式3(m-2n)/2m+n-15(2m+n)/m-2n-2
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
已知m^2+m-1=0,n^2-n-1=0,求代数式m^3+n^3+2m^2-2n^2+2008的值.
已知m+2n=3,m-2n=1,求代数式16m^2n^2-(m^2+4n^2)^2的值
已知m+n=3,则代数式(m+n)2次方-m+n分之5+m+n-2的值为________.
已知m=5 4/7,n=4 3/7, 求代数式[-7/2(m+n)]^3×(m-n)×[-2(m+n)(m-n)]^2的值
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
已知m+2n=3,m-2n=1,则代数式16m²n²-(m²+4n²)²的值为()不能先把m和n求出来,要用整体思想
已知m²+n²=10,m*n=4,则代数式-m^3n-n^3m=
已知x^m+n=3,y^m-n=2,求代数式(-1/3x^2m+n·y^5m-6n)·(1/2x^m+2n·y^2n-m)
已知1/m+1/n=3/m+n,求代数式n/m+m/n的值,请赐教
代数式2m=3n,则m/(m+n)-m/(m-n)-2n^2/(m^2-n^2)=
已知:(m+n)^2=7,(m-n)^2=3,求代数式m^4+n^4的值
已知2n-m=5,求代数式 5(m-2n)*+6n-3m-60的值
化简求值,已知m-n=-3,求代数式-(m-n)的平方-2(m-4)+2(6+n)
已知m+n=2,求代数式m²(1+n)+n²(1+m)的值
已知m+n=2,试求代数式m²(1+n)+n²(1+m)的值
已知2^m=1,2^n+1=6,求代数式2^m-n