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CDolphin
@CDolphin
August 2022
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Удачник66
Verified answer
X^3 + 7x^2 - 4x - 28 = 0
x^2*(x + 7) - 4(x + 7) = 0
(x + 7)(x^2 - 4) = 0
(x + 7)(x + 2)(x - 2) = 0
x1 = -7; x2 = -2; x3 = 2
1 votes
Thanks 1
Asjok426
Х^2(x+7)=4(x+7)
x^2=4
x=2 x=-2
0 votes
Thanks 0
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Answers & Comments
Verified answer
X^3 + 7x^2 - 4x - 28 = 0x^2*(x + 7) - 4(x + 7) = 0
(x + 7)(x^2 - 4) = 0
(x + 7)(x + 2)(x - 2) = 0
x1 = -7; x2 = -2; x3 = 2
x^2=4
x=2 x=-2