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106009
@106009
August 2022
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Найдите значения выражения ( 3х-12)(3х+12)-9х2+7х-4 при х=90
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fiofionina
Verified answer
Решение: (3х-12)(3х+12) -9х²+7х-4=9х² -144-9х²+7х-4=7х-148
Подставим значение х=90 в 7х-148:
7*90-148=630-148=482
Ответ: 482
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Answers & Comments
Verified answer
Решение: (3х-12)(3х+12) -9х²+7х-4=9х² -144-9х²+7х-4=7х-148Подставим значение х=90 в 7х-148:
7*90-148=630-148=482
Ответ: 482