Ответ:
(х-2)(х+2)-2х(5-х)=х²+2х-2х-4-10х+2х²=3х²-10х-4
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Ответ:
(х-2)(х+2)-2х(5-х)=х²+2х-2х-4-10х+2х²=3х²-10х-4