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If mn=5 and m-3n=8, what is m^2n-3mn^2?
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If mn=5 and m-3n=8, what is m^2n-3mn^2?
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Jul 20, 2015
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If mn=5 and m-3n=8, what is m^2n-3mn^2?
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Coincoin
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Yoshua Wuyts
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Jul 22, 2015
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Yoshua Wuyts
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= (m^2)n -3m(n^2). Factorise.
=mn( m-3n) : Recall mn = 5. (m-3n) =8.
Substituting:
=mn( m-3n)
= 5*(8) = 40.
Cheers.
Jordan Stefanelli
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Jul 25, 2015
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Jordan Stefanelli
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