Ответ:
(7х-11y)(7x+11y)-49x²=49x²-121y²-49x²=-121y²=-121×0,0001=-0,0121
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Ответ:
(7х-11y)(7x+11y)-49x²=49x²-121y²-49x²=-121y²=-121×0,0001=-0,0121