Question

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Answer 1

@Astrophysics

Answer 2

You can plug the roots in each of the following equations and set it equal to 0, and if 0 = 0 then that's the right one.

Answer 3

Or you can factor

Answer 4

polynomial with roots -√ 5, √ 5, and 3
(x- (-√ 5))((x- √ 5)(x-3) =0
(x+√ 5)(x- √ 5)(x-3) =0
(x^2 -5)(x-3) =0
You multiply both equation to get answer
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