-9m^2-6m-1+n^2
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-9m^2-6m-1+n^2-9m^2-6m-1+n^2-9m^2-6m-1+n^2-9m^2-6m-1+n^2=n^2-(9m^2+6m+1)=n^2-(3m+1)^2=(n+3m+1)(n-3m-
-9m^2-6m-1+n^2
-9m^2-6m-1+n^2
-9m^2-6m-1+n^2
-9m^2-6m-1+n^2
=n^2-(9m^2+6m+1)
=n^2-(3m+1)^2
=(n+3m+1)(n-3m-1)
m^2-6m+9与|n-1|互为相反数,则(m/n-n/m)/(m/n)为?
(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
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若(m+n)^2-6(m+n)+9=1,则m+n=多少?
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-9m^2-6m-1+n^2
(m^2-6mn+9n^2)÷(m-3n)-(4m^2-9n^2)÷(2m-3n),其中m=-3,n=-1/3(m^2-6mn+9n^2)÷(m-3n)-(4m^2-9n^2)÷(2m-3n),其中m=-3,n=-1/3
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