0.021-2.1y^2=

Solution for 0.021-2.1y^2= equation:

Simplifying
0.021 + -2.1y2 = 0

Solving
0.021 + -2.1y2 = 0

Solving for variable 'y'.

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

Add '-0.021' to each side of the equation.
0.021 + -0.021 + -2.1y2 = 0 + -0.021

Combine like terms: 0.021 + -0.021 = 0.000
0.000 + -2.1y2 = 0 + -0.021
-2.1y2 = 0 + -0.021

Combine like terms: 0 + -0.021 = -0.021
-2.1y2 = -0.021

Divide each side by '-2.1'.
y2 = 0.01

Simplifying
y2 = 0.01

Take the square root of each side:
y = {-0.1, 0.1}