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maksimovalbert
@maksimovalbert
July 2022
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Решите yравнение x³ + 3 x² - 25 x- 75 = 0 . Помогите,комy не сложно.
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7909nastya
X^2(х-3)-25(х-3)=0 (x^2-25)*(х-3)=0 х1 = 5 х2 = -5 х3 = 3
1 votes
Thanks 0
vikatereshchenk0
х*+3х*-25-75=0; 4х*-100=0; 4х*=100; х*=100:4; х*=25
MizoriesKun
x³ + 3 x² - 25 x- 75=0
x²(x
+ 3) - 25( x+3)=0
(x+3)(x
²-25
)=0
⇒ x+3=0 либо x²-25=0
x
₁
=-3 х
₂
=5; х
₃
= -5
2 votes
Thanks 1
maksimovalbert
x1=3 x2= 5 x3=5 . Так???
MizoriesKun
обнови страничку
MizoriesKun
x₁=-3 ; х₂=5; х₃= -5
maksimovalbert
спасибо)
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Answers & Comments
x²(x + 3) - 25( x+3)=0
(x+3)(x²-25)=0
⇒ x+3=0 либо x²-25=0
x₁=-3 х₂=5; х₃= -5