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lodandelions
@lodandelions
July 2022
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(а-7)²-2(а-7)(а+7)+(а+3)²
при: а=0,25
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Firuza25
(a - 7)² -2(a - 7)(a + 7) + (a + 3)² = a² - 14a + 49 -2(a² - 49) + a²+6a + 9 =
= a² - 14a + 49 - 2a² + 98 + a² + 6a + 9 = -8a +156 = 156 - 8a
при a = 0,25
156 - 8*0.25 = 156 - 2 = 154
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Answers & Comments
= a² - 14a + 49 - 2a² + 98 + a² + 6a + 9 = -8a +156 = 156 - 8a
при a = 0,25
156 - 8*0.25 = 156 - 2 = 154