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Math·Advanced Math·Nonlinear functions

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The functions $f$ and $g$ are defined by $f(x)=x^2+px+42$ and $g(x)=x^2+10x+18$, where $p$ is a constant. The solutions to $f(x)=0$ are $r$ and $s$, and the solutions to $g(x)=0$ are $r+2$ and $s+2$. What is the value of $p$?

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