Mathematics Quadratic Equations

The number of integral values of m for which the quadratic expression. \((1 + 2m)x^2 - 2(1 + 3m)x + 4(1 + m), \ x \in R\), is always positive, is: 

1
\(8\)
2
\(7\)
3
\(6\)
4
\(3\)

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