Question

已知m^2+n^2+10=2m-6n求代数式[4m^2(2m+2n)(m-n)][(m+n-2x

-n+2)+4-4n]的值?

Answer 1

解:移项得m^2-2m+n^2+6n+10=0
m^2-2m+1+n^2+6n+9=0
(m-1)^2+(n+3)^2=0
m=1,n=-3
带入原式即可
为你解答，如有帮助请采纳，
如对本题有疑问可追问，Good luck!