Factorise m square - 10m +25
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m^2 - 10m + 25
(Splitting up the middle term)
=m^2 -5m -5m +25
=(m-5)(m-5)
=(m-5)^2
(Splitting up the middle term)
=m^2 -5m -5m +25
=(m-5)(m-5)
=(m-5)^2
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