1. Let's understand the expression $x=\pm \frac{2}{1}$. This means $x$ can be either positive or negative $\frac{2}{1}$.\n\n2. The symbol $\pm$ means "plus or minus," indicating two possible values: $+\frac{2}{1}$ and $-\frac{2}{1}$.\n\n3. Since $\frac{2}{1} = 2$, the two values are $+2$ and $-2$.\n\n4. This notation is used when solving equations like $x^2 = 4$, where both $x=2$ and $x=-2$ satisfy the equation because squaring either gives 4.\n\n5. So, $x=\pm \frac{2}{1}$ means $x$ can be positive 2 or negative 2, covering both solutions.