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Math Help - cubed polynomial

  1. #1
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    cubed polynomial

    I'm stuck on how to factor this:
    r^3+4r^2+7r+6=0
    thanks!
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  2. #2
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    Quote Originally Posted by morganfor View Post
    I'm stuck on how to factor this:
    r^3+4r^2+7r+6=0
    thanks!
    You're expected to note that r = -2 is a solution to r^3+4r^2+7r+6=0 and therefore (r + 2) is a factor of r^3+4r^2+7r+6. Therefore you can find the quadratic factor of r^3+4r^2+7r+6 using polynomial long division etc.
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