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неизвестный0007
@неизвестный0007
July 2022
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miron2077
Verified answer
!!!!!!!!!!!!!!!!!!!!!!
0 votes
Thanks 1
Санечка69
Verified answer
(х² - 7х)² + 10(х² - 7х) = 0
обозначим х² - 7х = у
у² + 10у = 0
у(у + 10) = 0
у = 0 или у + 10 = 0
у = 0 у = -10
х² - 7х = 0 х² - 7х = -10
х(х - 10) = 0 х² - 7х + 10 = 0
х₁ = 0 х - 10 = 0 D = (-7)² - 4 · 1 · 10 = 49 - 40 = 9; √9 = 3
х₂ = 10 x₃ = (7 + 3)/2 = 5 x₄ = (7 - 3)/2 = 2
Ответ: 0; 2; 5; 10.
1 votes
Thanks 1
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Answers & Comments
Verified answer
!!!!!!!!!!!!!!!!!!!!!!Verified answer
(х² - 7х)² + 10(х² - 7х) = 0обозначим х² - 7х = у
у² + 10у = 0
у(у + 10) = 0
у = 0 или у + 10 = 0
у = 0 у = -10
х² - 7х = 0 х² - 7х = -10
х(х - 10) = 0 х² - 7х + 10 = 0
х₁ = 0 х - 10 = 0 D = (-7)² - 4 · 1 · 10 = 49 - 40 = 9; √9 = 3
х₂ = 10 x₃ = (7 + 3)/2 = 5 x₄ = (7 - 3)/2 = 2
Ответ: 0; 2; 5; 10.