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a) -2x²+2xy
b) -4y²+8xy
c)9x²+6x²y
d)12m+15mp-6mq
b)-4y(y-2x)=-4y(do drugiej potęgi)+8xy
c)3x(2xy+3x)=6xy+9x(do drugiej potęgi)
d)3m(4+5p-2q)=12m+15mp-6mq