200=4R^2

Solution for 200=4R^2 equation:

Simplifying
200 = 4R2

Solving
200 = 4R2

Solving for variable 'R'.

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

Add '-4R2' to each side of the equation.
200 + -4R2 = 4R2 + -4R2

Combine like terms: 4R2 + -4R2 = 0
200 + -4R2 = 0

Add '-200' to each side of the equation.
200 + -200 + -4R2 = 0 + -200

Combine like terms: 200 + -200 = 0
0 + -4R2 = 0 + -200
-4R2 = 0 + -200

Combine like terms: 0 + -200 = -200
-4R2 = -200

Divide each side by '-4'.
R2 = 50

Simplifying
R2 = 50

Take the square root of each side:
R = {-7.071067812, 7.071067812}