$$\dfrac{1}{-0.25j+0.25}-0.2j=\color{red}{\text{??}}$$

ERROR: Cannot divide by zero.

Explanation

$$ \begin{aligned}\frac{1}{-0.25j+0.25}-0.2j& \xlongequal{ }\frac{1}{-0.25j+0.25}-0j \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{1}{-0j+0.25}-0j \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{1}{0} \xlongequal{ } \\[1 em] & \xlongequal{} \text{Cannot divide by zero.}\end{aligned} $$

①

Subtract $0j$ from $ \dfrac{1}{0j0} $ to get $ \dfrac{ \color{purple}{ 1 } }{ 0 }$.

Step 1: Write $ 0j $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator.

Step 2: To subtract raitonal expressions, both fractions must have the same denominator.
We can create a common denominator by multiplying the second fraction by $\color{blue}{0}$.

$$ \begin{aligned} \frac{1}{0j0} -0j & \xlongequal{\text{Step 1}} \frac{1}{0j0} - \frac{0j}{\color{red}{1}} = \frac{ 1 }{ 0j0 } - \frac{ 0j \cdot \color{blue}{ 0 }}{ 1 \cdot \color{blue}{ 0 }} = \\[1ex] & \xlongequal{\text{Step 2}} \frac{ \color{purple}{ 1 } }{ 0j0 } - \frac{ \color{purple}{ 0j } }{ 0j0 }=\frac{ \color{purple}{ 1 } }{ 0 } \end{aligned} $$

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$$\dfrac{1}{-0.25j+0.25}-0.2j=\color{red}{\text{??}}$$ERROR: Cannot divide by zero.

$$\dfrac{1}{-0.25j+0.25}-0.2j=\color{red}{\text{??}}$$

ERROR: Cannot divide by zero.