Ответ:
х²-6х+9=4х-12
х²-6х-4х+9+12=0
х²-10х+21=0
х²-3х-7х+21=0
х(х-3)-7(х-3)=0
(х-7)×(х-3)=0
х-7=0
х-3=0
х1=7
х2=3
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Ответ:
х²-6х+9=4х-12
х²-6х-4х+9+12=0
х²-10х+21=0
х²-3х-7х+21=0
х(х-3)-7(х-3)=0
(х-7)×(х-3)=0
х-7=0
х-3=0
х1=7
х2=3