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Yuliya0117
@Yuliya0117
July 2022
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x²-5x=3-x² решите пожалуйста
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anr18
X² - 5x = 3 - x²
X² + X² - 5х - 3 = 0
2X² - 5х - 3 = 0
D = b² - 4ac
D = (-5)² - 4 * 2 * (-3) = 25 + 24 = 49
x12 = -b ± √D / 2a (/ - дробь)
х12 = 5 ± 7 / 4
х1 = 12/4 = 3
x2 = -2/4 = -0,5
Ответ: 3; -0,5
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Answers & Comments
X² + X² - 5х - 3 = 0
2X² - 5х - 3 = 0
D = b² - 4ac
D = (-5)² - 4 * 2 * (-3) = 25 + 24 = 49
x12 = -b ± √D / 2a (/ - дробь)
х12 = 5 ± 7 / 4
х1 = 12/4 = 3
x2 = -2/4 = -0,5
Ответ: 3; -0,5