Problem Solving (PS) | If x^2 - 2x - 35 = 0 and x>0, which of the following must be equal to

If x^2 - 2x - 35 = 0 and x>0, which of the following must be equal to 0?

I. x^2 - 7x + 12
II. x^2 - 13x + 42
III. x^2 - 5x + 6

(a) I only
(b) II only
(c) III only
(d) II and III only
(e) I, II, and III

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