The number of 2 digit positive integral values of m, for which the roots of the equation $m x^{2} + (2 m - 1) x + (m - 2) = 0$ are rational is ___

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The number of 2 digit positive integral values of m, for which the roots of the equation $m x^{2} + (2 m - 1) x + (m - 2) = 0$ are rational is 7.
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The number of 2 digit positive integral values of m, for which the roots of the equation mx²+(2m-1)x+(m-2) = 0 are rational is

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