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Which of the following is a polynomial with roots: −square root of 5, square root of 5, and 3? x3 − 3x2 − 5x + 15 x3 + 2x2 − 3x − 6 x3 − 2x2 − 3x + 6 x3 + 3x2 − 5x − 15
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Which of the following is a polynomial with roots: −square root of 5, square root of 5, and 3?

x3 − 3x2 − 5x + 15
x3 + 2x2 − 3x − 6
x3 − 2x2 − 3x + 6
x3 + 3x2 − 5x − 15

User Mike Tsayper
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1 Answer

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(x - 3)(x- √(5))(x+√(5))\\\\= (x - 3)(x^2 -5)\\\\=x^3 - 3x^2 - 5x + 15

Answer is A
User Mister Magoo
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