Solve A=Gpi-pi^2

$$A = G \pi - \pi ^ { 2 }$$

Solve for G

$$G=\frac{A}{\pi }+\pi$$

Steps for Solving Linear Equation

Swap sides so that all variable terms are on the left hand side.

$$G\pi -\pi ^{2}=A$$

Add \pi ^{2} to both sides.

$$G\pi =A+\pi ^{2}$$

The equation is in standard form.

$$\pi G=A+\pi ^{2}$$

Divide both sides by \pi .

$$\frac{\pi G}{\pi }=\frac{A+\pi ^{2}}{\pi }$$

Dividing by \pi undoes the multiplication by \pi .

$$G=\frac{A+\pi ^{2}}{\pi }$$

Divide A+\pi ^{2} by \pi .

$$G=\frac{A}{\pi }+\pi$$

Solve for A

$$A=\pi \left(G-\pi \right)$$