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For each of the following pairs of roots, obtain a corresponding equation in the form `ax^2` + bx +c = 0, where a, b and c are constants.
(a) (0, -3)
(b) (-3, -3)
(c)`(-2 1/2, 31/2)`
(d) (p, q)
(e) `(1/p, 1/q)`