Roots mean solutions that make it true or zeroes. A possible solution would be:
`(x + 2)(x + 1/2)(x -5)`
``when multiplied gives you:
`x^3 - 5/2x^2-23/2x - 5`
which is choice a from your solutions.
`-5/2 = -2.5`
and `-23/2 = -11.5`
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