Wyłącz wspólny czynnik poza nawias:
a) 15x+30=
b) 8ab-4ab+6b=
c) 2x(x-y)-3(x-y)=
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b) 2b*4a-2b*2a+2b*3=2b(4a-2a+3)
c) 2x*(x-y)-3*(x-y)=(x-y)(2x-3)