9=0.25x^2

Solution for 9=0.25x^2 equation:

Simplifying
9 = 0.25x2

Solving
9 = 0.25x2

Solving for variable 'x'.

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

Add '-0.25x2' to each side of the equation.
9 + -0.25x2 = 0.25x2 + -0.25x2

Combine like terms: 0.25x2 + -0.25x2 = 0.00
9 + -0.25x2 = 0.00

Add '-9' to each side of the equation.
9 + -9 + -0.25x2 = 0.00 + -9

Combine like terms: 9 + -9 = 0
0 + -0.25x2 = 0.00 + -9
-0.25x2 = 0.00 + -9

Combine like terms: 0.00 + -9 = -9
-0.25x2 = -9

Divide each side by '-0.25'.
x2 = 36

Simplifying
x2 = 36

Take the square root of each side:
x = {-6, 6}