L=4 $\pi$ j^2
Express j as the subject of formula
You asked:
Solve the equation \[L = 4 \cdot \pi \cdot {j}^{2}\] for the unknown \(j\).
MathBot Answer:
$$\begin{aligned}j &= - \frac{\sqrt{L}}{2 \sqrt{\pi}}\\j &= \frac{\sqrt{L}}{2 \sqrt{\pi}}\end{aligned}$$