polynomial with factorial coefficients.

Level pending

the number of real roots of the polynomial

\(x^{5}\) + \(2x^{4}\) + 6\(x^{3}\) + \(24x^{2}\) + \(120x\) + \(720\) has \(a\) solutions,

the number of real roots of the polynomial

\(x^{4}\) + \(2x^{3}\) + 6\(x^{2}\) + \(24x\) + \(120\) has \(b\) solutions.

find \(a\) + \(b\)

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