-169r^2+1=

Solution for -169r^2+1= equation:

Simplifying
-169r2 + 1 = 0

Reorder the terms:
1 + -169r2 = 0

Solving
1 + -169r2 = 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 + -169r2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -169r2 = 0 + -1
-169r2 = 0 + -1

Combine like terms: 0 + -1 = -1
-169r2 = -1

Divide each side by '-169'.
r2 = 0.005917159763

Simplifying
r2 = 0.005917159763

Take the square root of each side:
r = {-0.076923077, 0.076923077}