Zapisz w jak najprostszej postaci: 12b* ( b-1)/(4)+14*(b kwadrat - 2b)/(21) - (b-b kwadrat)/3 =
Legenda: * = mnożenie kwadrat= do potęgi drugiej / = kreska ułamkowa
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chyba to db rozszyfrowalem:
3b^2 - 3b + 2/3b^2 - 4/3b -1/3b + 1/3b^2 =
= 4b^2 - 4/2/3b=
= b (4b - 4/2/3)
12b*(b-1)/4 +14*(b^2-2b)/21 -(b-b^2)/3 =
= 3b^2 - 3b + 2/3b^2 - 4/3b - 1/3b +1/3b^2=
=3b^2+2/3b^2+1/3b^2 -3b- 4/3b-1/3b =
= 4b^2 -4 2/3b