Ответ:
х²+х-1-х+х-1
х²+2х-2-х
х×(х+2)-(х+2)
(х+2)×(х-1)
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Ответ:
х²+х-1-х+х-1
х²+2х-2-х
х×(х+2)-(х+2)
(х+2)×(х-1)