Find the values of \(p\) and \(q\) for which \(\displaystyle x = \frac{3}{4}\) and \(x = - 2\)  ...

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Find the values of \(p\) and \(q\) for which \(\displaystyle x = \frac{3}{4}\) and \(x = - 2\)  are the roots of the equation \(px^2 + qx - 6 = 0\)
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