100r^2-121=

Solution for 100r^2-121= equation:

Simplifying
100r2 + -121 = 0

Reorder the terms:
-121 + 100r2 = 0

Solving
-121 + 100r2 = 0

Solving for variable 'r'.

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

Add '121' to each side of the equation.
-121 + 121 + 100r2 = 0 + 121

Combine like terms: -121 + 121 = 0
0 + 100r2 = 0 + 121
100r2 = 0 + 121

Combine like terms: 0 + 121 = 121
100r2 = 121

Divide each side by '100'.
r2 = 1.21

Simplifying
r2 = 1.21

Take the square root of each side:
r = {-1.1, 1.1}