Aaron is solving the equation x2 - x = - 2 with the quadratic formula. What values should he use for a, b, and c?

a = 1, b = - 1, c = - 2

a = - 1, b = 1, c = - 2

a = 1, b = - 1, c = 2

a = - 1, b = 1, c = 2

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