640=3f^2

Solution for 640=3f^2 equation:

Simplifying
640 = 3f2

Solving
640 = 3f2

Solving for variable 'f'.

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

Add '-3f2' to each side of the equation.
640 + -3f2 = 3f2 + -3f2

Combine like terms: 3f2 + -3f2 = 0
640 + -3f2 = 0

Add '-640' to each side of the equation.
640 + -640 + -3f2 = 0 + -640

Combine like terms: 640 + -640 = 0
0 + -3f2 = 0 + -640
-3f2 = 0 + -640

Combine like terms: 0 + -640 = -640
-3f2 = -640

Divide each side by '-3'.
f2 = 213.3333333

Simplifying
f2 = 213.3333333

Take the square root of each side:
f = {-14.605934866, 14.605934866}