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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) (-2, 2)
(b) `(1/2, 1/3,)`
(c)`(1/4, -3)`
(d) (-3, -5)
(e) (0.5, 0.75)