1.zapisz w jak najprostrzej postaci nastepujace wyrazenie:
(2a-3b)^+(b-2a)(b+2a)-3b(b+2a).
2.zapisz sumy w posatci iloczynow:
a.4x^-12x
b.20x^y^+10xy^-15x^y
legenda:
^ - kwadrat
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(2a-3b)^+(b-2a)(b+2a)-3b(b+2a)=4a^-12ab+b^-4a^-3b^-6ab=
=-18ab-2b^