упростите выражение 7(х+8)+(х+8)(х-8) решите плиз 10 дам
7(х+8)+(х+8)(х-8) = 7х+56+х²-64=х²+7х-8
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7(х+8)+(х+8)(х-8) = 7х+56+х²-64=х²+7х-8