4m (m-1)-3 n (3n-2) please factorise it
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4m (m-1)-3 n (3n-2)
= 4m² -4m -9n² +6n
= (4m²-9n² )-4m +6n
= (2m+3n)(2m-3n) -2(2m-3n)
= (2m-3n)(2m-3n-2)
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