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KiRa [710]
4 years ago
9

Which of the following is a polynomial with roots: − square root of 5 , square root of 5 , and −3?

Mathematics
1 answer:
tresset_1 [31]4 years ago
4 0
Roots: - √5 , √5, and - 3

=> these are factors of the polynomial: (x + √5), (x - √5), and (x + 3).

Multiply those three factors:

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

Therefore the polynomial x^2 + 3x^2 - 5x - 15 is a polynomial with the given roots.

Answer: option B. x^3 + 3x^2 - 5x - 15
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In the complex numbers (a + bi) and (c + di), we can add the real parts together and the imaginary parts together, so their sum is

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Let us use this fact to solve our question

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