factorise 9mn^-12m^n
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9mn^-12m^n
= ( 3×3×m×n×n) - ( 3×4×m×m×n)
= 3×m×n (3n-4m)
=3mn (3n-4m)
Ans: Factorise of (9mn^-12m^n) is 3mn (3n-4m).
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