(х+3)(х-1)+3=0
х²-х+3х-3+3=0
х²+2х=0
х(х+2)=0
х1=0 х2=-2
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(х+3)(х-1)+3=0
х²-х+3х-3+3=0
х²+2х=0
х(х+2)=0
х1=0 х2=-2