已知M^2-MN=2,MN-N^2=-15求式子M^2-N^2与M^2-2MN+N^2
1个回答
m²-n²=m²-mn+mn-n²=(m²-mn)+(mn-n²)=2+(-15)=-13
m²-2mn+n²=(m²-mn)-(mn-n²)=2-(-15)=17
相关问题
已知m^2-mn=21,mn-n^2=-15,求m^2-2mn+n^2的值
已知m2-mn=21.mn-n2=-15.求m2-2mn+n2的值
已知m-n=4,mn=-1,求:(2mn+2m+3n)+(3mn+2n-2m)-(m+4n+mn)
1.已知m-n=2 mn=-2求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-mn=21,mn-n=15,求m-n与m-2mn+n的值.
已知m-n=5,mn=-3,求-(m+4n-mn)-(2mn-2m-3n)+(2n-2m-3mn)的值.
已知m-n=5,mn=-3,求-(m+4n-mn)-(2mn-2m-3n)+(2n-2m-3mn)的值
已知m-n=4,mn=-1,求:(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值.
已知m-n=3,mn=-3,求(-m-4n-mn)-(2mn-2m-3n)-(3mn+2n-2m)的值