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Find the value of the products: (3m-2n)...

Find the value of the products: `(3m-2n)(2m-3n)a t\ m=1,\ n=-1`

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`(3m-2n)(2m-3n)`
`3m(2m-3n)-2n(2m-3n)`
`6m^2-9mn-4nm-6n^2`
`6m^2-13mn-6n^2`
`where m=1,n=-1`
`6(1)^2-13xx1xx-1+(6-1)^2`
`6+13+6`
`12+13`
`25`
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