2.25=r^2

Solution for 2.25=r^2 equation:

Simplifying
2.25 = r2

Solving
2.25 = r2

Solving for variable 'r'.

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

Add '-1r2' to each side of the equation.
2.25 + -1r2 = r2 + -1r2

Combine like terms: r2 + -1r2 = 0
2.25 + -1r2 = 0

Add '-2.25' to each side of the equation.
2.25 + -2.25 + -1r2 = 0 + -2.25

Combine like terms: 2.25 + -2.25 = 0.00
0.00 + -1r2 = 0 + -2.25
-1r2 = 0 + -2.25

Combine like terms: 0 + -2.25 = -2.25
-1r2 = -2.25

Divide each side by '-1'.
r2 = 2.25

Simplifying
r2 = 2.25

Take the square root of each side:
r = {-1.5, 1.5}