Odpowiedź:
1.
(n+3+n+4+n+5):3=(3n+12):3=n+4
2.
(2m-1)(2m-3)=4m²-6m-2m+3=4m²-8m+3
3.
2n - cyfra dziesiatek
n - cyfra jednosci
2n*10+n=20n+n=21n
4.
a+1 2(a+1)=2a+2
a-1 a-1-6=a-7
2a+2-(a-7)=2a+2-a+7=a+9
(x+3+x+4+x+5):3=(3x+12):3= x+4
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Odpowiedź:
1.
(n+3+n+4+n+5):3=(3n+12):3=n+4
2.
(2m-1)(2m-3)=4m²-6m-2m+3=4m²-8m+3
3.
2n - cyfra dziesiatek
n - cyfra jednosci
2n*10+n=20n+n=21n
4.
a+1 2(a+1)=2a+2
a-1 a-1-6=a-7
2a+2-(a-7)=2a+2-a+7=a+9
(x+3+x+4+x+5):3=(3x+12):3= x+4