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gradloter
@gradloter
August 2022
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Срочно! 25 и 26
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IrkaShevko
Verified answer
25. 15x² - 7x + 12 = 13x² - 12x + 10
2x² + 5x + 2 = 0
D = 25 - 16 = 9 > 0
x1 + x2 = -2.5 - по т. Виета
Ответ: -2,5
26. x² - 10x + 6 = -8x + 5
x² - 2x + 1 = (x-1)² = 0
x = 1
Ответ: 1
1 votes
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Answers & Comments
Verified answer
25. 15x² - 7x + 12 = 13x² - 12x + 102x² + 5x + 2 = 0
D = 25 - 16 = 9 > 0
x1 + x2 = -2.5 - по т. Виета
Ответ: -2,5
26. x² - 10x + 6 = -8x + 5
x² - 2x + 1 = (x-1)² = 0
x = 1
Ответ: 1