\[
\begin{array}{l}
\text { Let } f(x)=f_{1}(x)-2 f_{2}(x) \text {,...
\[
\begin{array}{l}
\text { Let } f(x)=f_{1}(x)-2 f_{2}(x) \text {, where } \\
f_{1}(x)=\left\{\begin{array}{ll}
\min \left\{x^{2},|x|\right\}, & |x| \leq 1 \\
\max \left\{x^{2},|x|\right\}, & |x|1
\end{array}\right. \\
f_{2}(x)=\left\{\begin{array}{ll}
\min \left\{x^{2},|x|\right\}, & |x|1 \\
\max \left\{x^{2},|x|\right\}, & |x| \leq 1
\end{array},\right. \\
\end{array}
\]
P
W
For \( x \in(-1,0), f(x)+g(x) \) is
(a) \( x^{2}-2 x+1 \)
(b) \( x^{2}+2 x-1 \)
(c) \( x^{2}+2 x+1 \)
(d) \( x^{2}-2 x-1 \)
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