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aussy123

  • 3 years ago

x + 3 is a factor of x3 - 4x2 - 18x + 9 True False

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  1. Zekarias
    • 3 years ago
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    test it by inserting x =-3 in the expression\[x^{3}-4x^{2}-18x+9\]

  2. aussy123
    • 3 years ago
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    so substitute -3 into the equation and then mult.

  3. Zekarias
    • 3 years ago
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    find out if it gives you zero

  4. aussy123
    • 3 years ago
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    im confused.. am I supposed to do this 3^-3-4(3)^2-18(3)+9

  5. nubeer
    • 3 years ago
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    (-3)^3-4(3)^2-18(3)+9

  6. aussy123
    • 3 years ago
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    Its false

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