10
If the sum of the zeroes of the polynomial $p(x) = (p + 1) x^2 + (2p + 3) x + (3p + 4)$ is $-1$, then find the value of 'p'.
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Sum of zeroes $$\begin{aligned}& = -\frac{2p + 3}{p+1} = -1 \\ & p = -2\end{aligned}$$