Ответ:
х^2-16-6х=х^2-4х+4
-16-6х=-4х+4
-6х+4х=16+4
-2х=20
х=10
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Ответ:
х^2-16-6х=х^2-4х+4
-16-6х=-4х+4
-6х+4х=16+4
-2х=20
х=10