Question 46574
{{{(m^2-4m)/(4-m)}}}[Factor]
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{{{((m)(m-4))/(4-m))}}} 
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{{{((m)(m-4))/((-1)(4-m))}}} [Multiply the denominator by (-1)]
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{{{((m)(m-4))/((-4+m))}}} [Switch the order of the denominator]
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{{{((m)(m-4))/((m-4))}}} [Cancel]
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(m)[final answer]