(7m²-4mn-n²)-(3m²-mn+2n²)求解
2个回答
(7m²-4mn-n²)-(3m²-mn+2n²)
=(7m²-4mn-n²)-3m²+mn-2n²
=4m²-3mn-3n²
相关问题
(3m-5n+4mn)-(2m-4n+6mn)其中m-n=7,mn=-5
m-n=7 mn=-5求(3m+5n+4mn)-(2n-4n+6mn)
已知m-n=4,mn=-1,求:(2mn+2m+3n)+(3mn+2n-2m)-(m+4n+mn)
7m²n-3mn²+5m²n+2mn²
若m-n=7,mn=-5,求(3m-5n+4mn)-(2m-4n+6mn)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=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
若m-n=7,mn=一5,求(3m-5n+4mn)-(2m-4n+6mn)的值
4(-2mn+2m+3n)-2(3m+5n-mn),其中m+n=3,mn=-1