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B= 4x+3y+12xy
C= 7xy - 2y + 4x
Wyznacz podane wielomiany.
A+B= -12xy - 3x + 2y+4x+3y+12xy=x+5y
B+C=4x+3y+12xy +7xy - 2y + 4x= 8x+y +19xy
A+C= -12xy - 3x + 2y +7xy - 2y + 4x= x-5xy
B-A=4x+3y+12xy+12xy +3x -2y=7+y+24xy
C-B=7xy - 2y + 4x-4x-3y-12xy= -5xy -5y
A+B-C=-12xy - 3x + 2y +4x+3y+12xy -7xy+ 2y - 4x=7y-7xy-3x
A-B-C=-12xy - 3x + 2y-4x-3y-12xy-7xy +2y - 4x=-31xy-11x+y