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vanchikfrolov
@vanchikfrolov
July 2022
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Решите уравнение х3 +5x2-25x-125=0
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ShirokovP
Verified answer
X^2 (x + 5) - 25(x + 5) = 0
(x + 5)(x^2 - 25) = 0
(x + 5)(x - 5)(x + 5) = 0
(x - 5)(x + 5)^2 = 0
1)
x - 5 = 0
x = 5;
2)
(x + 5)^2 = 0
x + 5 = 0
x = - 5;
Ответ:
- 5; 5
4 votes
Thanks 9
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Answers & Comments
Verified answer
X^2 (x + 5) - 25(x + 5) = 0(x + 5)(x^2 - 25) = 0
(x + 5)(x - 5)(x + 5) = 0
(x - 5)(x + 5)^2 = 0
1)
x - 5 = 0
x = 5;
2)
(x + 5)^2 = 0
x + 5 = 0
x = - 5;
Ответ:
- 5; 5