Which of the following is a polynomial with roots negative square root of 3, square root of 3, and -2?

x3 – 2×2 – 3x + 6 x3 + 2×2 – 3x – 6 x3 – 3×2 – 5x + 15

x3 + 3×2 – 5x – 15

2 Answers

  • Eliminate the last two because 15 is not even (which it would be if -2 were a root). Eliminate the first one, because the sum of its roots is 2 instead of -2. So, by process of elimination the answer is the second one.

  • Expand (x+√3)(x-√3)(x+2)

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