900=y^2

Solution for 900=y^2 equation:

Simplifying
900 = y2

Solving
900 = y2

Solving for variable 'y'.

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

Add '-1y2' to each side of the equation.
900 + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
900 + -1y2 = 0

Add '-900' to each side of the equation.
900 + -900 + -1y2 = 0 + -900

Combine like terms: 900 + -900 = 0
0 + -1y2 = 0 + -900
-1y2 = 0 + -900

Combine like terms: 0 + -900 = -900
-1y2 = -900

Divide each side by '-1'.
y2 = 900

Simplifying
y2 = 900

Take the square root of each side:
y = {-30, 30}