х²+6х+9+х²-8х+16=2(4х+12-х²-3х)
х²+6х+9+х²-8х+16=8х+24-2х²-6х
4х²-4х+1=0
х²-х+1/4=0
(х-1/2)²=0
х-1/2=0
х=0,5
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х²+6х+9+х²-8х+16=2(4х+12-х²-3х)
х²+6х+9+х²-8х+16=8х+24-2х²-6х
4х²-4х+1=0
х²-х+1/4=0
(х-1/2)²=0
х-1/2=0
х=0,5