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b) (x+5)(2x+3)=0(x+5)(x+3/2)=0x= -5 lub x=-3/2
c) 5(x-4)(x-1)=0x=4 lub x=1
d) -5(x+3)· x =0x=0 lub x=-3
e) 2x·(x-7)=0x=0 lub x=7