5. Factorise m(m-1)-n(n-1)
plz answet this
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m^2-m-n^2+n
(m+n)(m-n)-m+n
(m+n)(m-n)-1(m-n)
(m+n-1)(m-n)
(m+n)(m-n)-m+n
(m+n)(m-n)-1(m-n)
(m+n-1)(m-n)
noora35:
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