One factor of f (x) 5x^3+5x^2-170+280 is (x + 7). What are all the roots of the function? Use the Remainder Theorem.

a. x = - 4, x = - 2, or x = 7

b. x = - 7, x = 2, or x = 4

c. x = - 7, x = 5, or x = 280

d. x = - 280, x = - 5, or x = 7

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