m+n=-3,mn=2,求-3(1/3n-mn)+2(mn-1/2m)

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m+n=-3,mn=2,求-3(1/3n-mn)+2(mn-1/2m)m+n=-3,mn=2,求-3(1/3n-mn)+2(mn-1/2m)m+n=-3,mn=2,求-3(1/3n-mn)+2(mn-

m+n=-3,mn=2,求-3(1/3n-mn)+2(mn-1/2m)
m+n=-3,mn=2,求-3(1/3n-mn)+2(mn-1/2m)

m+n=-3,mn=2,求-3(1/3n-mn)+2(mn-1/2m)
-3(1/3n-mn)+2(mn-1/2m)=-3*1/3n-3*(-mn)+2*mn-2*1/2m=-n+6+4-m=-n-m+10=-(n+m)+10=-(-3)+10=3+10=13

-3(1/3n-mn)+2(mn-1/2m)=-n+3mn+2mn-m=-n+3*2+2*2-m=6+4-(m+n)=10+3=13