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VikaMazepa
@VikaMazepa
July 2022
1
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Срочно,пожалуйста кроме 1,2,3,6
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Некто235
#4 - б
#5
а(а - 2) - (а - 1)(а - 3) = а² - 2а - (а² - 3а - а + 3) = а² - 2а - а² + 3а + а - 3 = 2а - 3
а = 0,25
2 * 0,25 - 3 = -2,5
#6 - б
#7
3х + 1 = х - 3
2х = -4
х = -2
у(-2) = - 2 - 3 = -5
Ответ: (-2 ; -5) - г
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Answers & Comments
#5
а(а - 2) - (а - 1)(а - 3) = а² - 2а - (а² - 3а - а + 3) = а² - 2а - а² + 3а + а - 3 = 2а - 3
а = 0,25
2 * 0,25 - 3 = -2,5
#6 - б
#7
3х + 1 = х - 3
2х = -4
х = -2
у(-2) = - 2 - 3 = -5
Ответ: (-2 ; -5) - г