Odpowiedź:
a) 9x^2-12y-1
b) 3x+12
c) x-9y+12x-4y=13x-13y
d) 2x^2+4xy-6x-12y
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Odpowiedź:
a) 9x^2-12y-1
b) 3x+12
c) x-9y+12x-4y=13x-13y
d) 2x^2+4xy-6x-12y