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нарвана
@нарвана
August 2021
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Найдите значение выражения (9 – 7)² + 3³
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alisher1221
(9 – 7)² + 3³=
по формуле (a-b)^2=a^2-2ab+b^2 получаем:
9^2-2×9×7+7^2+3^3=
81-126+49+27=-45+49+27=4+27=31
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Answers & Comments
по формуле (a-b)^2=a^2-2ab+b^2 получаем:
9^2-2×9×7+7^2+3^3=
81-126+49+27=-45+49+27=4+27=31