Odpowiedź:
a. 12m+3n+6m-n=18m+2n
b. -7x+6y-4-x+y+12=-8x+7y+8
c. 6x^2-x+12x+x^2-2x=7x^2+9x
d. 2xy+4x^2•y-5xy-3x^2•y+3xy=
=x^2•y
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Odpowiedź:
a. 12m+3n+6m-n=18m+2n
b. -7x+6y-4-x+y+12=-8x+7y+8
c. 6x^2-x+12x+x^2-2x=7x^2+9x
d. 2xy+4x^2•y-5xy-3x^2•y+3xy=
=x^2•y