-121r^2+1=

Solution for -121r^2+1= equation:

Simplifying
-121r2 + 1 = 0

Reorder the terms:
1 + -121r2 = 0

Solving
1 + -121r2 = 0

Solving for variable 'r'.

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

Add '-1' to each side of the equation.
1 + -1 + -121r2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -121r2 = 0 + -1
-121r2 = 0 + -1

Combine like terms: 0 + -1 = -1
-121r2 = -1

Divide each side by '-121'.
r2 = 0.00826446281

Simplifying
r2 = 0.00826446281

Take the square root of each side:
r = {-0.090909091, 0.090909091}