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Which of the following is a factor of x^3-4x^2-18x+9

Which of the following is a factor of x^3-4x^2-18x+9
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1 vote
Which of the following is a factor of x^3-4x^2-18x+9

User Stanislav Shamilov
by
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2 Answers

1 vote
Hello,


x^3-4x^2-18x+9\\ =x^3+3x^2-7x^2-21x+3x+9\\ =x^2(x+3)-7x(x+3)+3(x+3)\\ =(x+3)(x^2-7x+3)\\ =(x+3)(x- (7- √(37))/(2) )(x- (7+ √(37))/(2) )
User Marlies
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7.9k points
6 votes
(x-2)(x^2-7x+3) most likely

User Taskinoor
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8.6k points
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