25-r^2=

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Solution for 25-r^2= equation: 


Simplifying
25 + -1r2 = 0

Solving
25 + -1r2 = 0

Solving for variable 'r'.

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

Add '-25' to each side of the equation.
25 + -25 + -1r2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -1r2 = 0 + -25
-1r2 = 0 + -25

Combine like terms: 0 + -25 = -25
-1r2 = -25

Divide each side by '-1'.
r2 = 25

Simplifying
r2 = 25

Take the square root of each side:
r = {-5, 5}

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