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Andreas93 [3]
3 years ago
11

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

Mathematics
2 answers:
zimovet [89]3 years ago
7 0
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- \frac{7- \sqrt{37}}{2} )(x- \frac{7+ \sqrt{37}}{2} )
monitta3 years ago
3 0
(x-2)(x^2-7x+3) most likely

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