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DenBrain
@DenBrain
August 2022
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Знайдіть значення виразу 25-х2/х2-6х+5 , при х= -99
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Universalka
Verified answer
Сначала упростим выражение (25 - x²)/(x² -6x + 5) = (5 - x)(5 + x)/(x - 5)(x -1) = (5 + x)/(1 - x) Если x = - 99 , то (5 - 99)/( 1 + 99) = - 94/ 100 = - 0,94
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DenBrain
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Verified answer
Сначала упростим выражение (25 - x²)/(x² -6x + 5) = (5 - x)(5 + x)/(x - 5)(x -1) = (5 + x)/(1 - x) Если x = - 99 , то (5 - 99)/( 1 + 99) = - 94/ 100 = - 0,94