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proszę szybko
3(m+1)(n-2)+2(n+1)(m-2)


Odpowiedź :

6mn - 6m + 3n - 6 + 2mn - 4n + 2m - 4 = 8mn - n - 4m - 10

3m(n-2) +3(n-2)+2n(m-2)+2(m-2)=3mn-6m+3n-6+2mn-4n+2m-4=5mn-4m-n-10