144*3.14=r^2*9

Solution for 144*3.14=r^2*9 equation:

Simplifying
144 * 3.14 = r2 * 9

Multiply 144 * 3.14
452.16 = r2 * 9

Reorder the terms for easier multiplication:
452.16 = 9r2

Solving
452.16 = 9r2

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-9r2' to each side of the equation.
452.16 + -9r2 = 9r2 + -9r2

Combine like terms: 9r2 + -9r2 = 0
452.16 + -9r2 = 0

Add '-452.16' to each side of the equation.
452.16 + -452.16 + -9r2 = 0 + -452.16

Combine like terms: 452.16 + -452.16 = 0.00
0.00 + -9r2 = 0 + -452.16
-9r2 = 0 + -452.16

Combine like terms: 0 + -452.16 = -452.16
-9r2 = -452.16

Divide each side by '-9'.
r2 = 50.24

Simplifying
r2 = 50.24

Take the square root of each side:
r = {-7.088018059, 7.088018059}