400y^2-16=0

Solution for 400y^2-16=0 equation:

Simplifying
400y2 + -16 = 0

Reorder the terms:
-16 + 400y2 = 0

Solving
-16 + 400y2 = 0

Solving for variable 'y'.

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

Add '16' to each side of the equation.
-16 + 16 + 400y2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 400y2 = 0 + 16
400y2 = 0 + 16

Combine like terms: 0 + 16 = 16
400y2 = 16

Divide each side by '400'.
y2 = 0.04

Simplifying
y2 = 0.04

Take the square root of each side:
y = {-0.2, 0.2}