Cari nilai b (complex solution)
\left\{\begin{matrix}\\b=0\text{, }&\text{unconditionally}\\b\in \mathrm{C}\text{, }&x=0\\b\in \mathrm{C}\setminus -\frac{1}{2},\frac{1}{2}\text{, }&x=-4\end{matrix}\right,
Cari nilai x (complex solution)
\left\{\begin{matrix}\\x=0\text{, }&\text{unconditionally}\\x\in \mathrm{C}\text{, }&b=0\\x=-4\text{, }&b\neq -\frac{1}{2}\text{ and }b\neq \frac{1}{2}\end{matrix}\right,
Cari nilai b
\left\{\begin{matrix}\\b=0\text{, }&\text{unconditionally}\\b\in \mathrm{R}\text{, }&x=0\\b\in \mathrm{R}\setminus -\frac{1}{2},\frac{1}{2}\text{, }&x=-4\end{matrix}\right,
Cari nilai x
\left\{\begin{matrix}\\x=0\text{, }&\text{unconditionally}\\x\in \mathrm{R}\text{, }&b=0\\x=-4\text{, }&|b|\neq \frac{1}{2}\end{matrix}\right,
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