16r^2-25=

Solution for 16r^2-25= equation:

Simplifying
16r2 + -25 = 0

Reorder the terms:
-25 + 16r2 = 0

Solving
-25 + 16r2 = 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 + 16r2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 16r2 = 0 + 25
16r2 = 0 + 25

Combine like terms: 0 + 25 = 25
16r2 = 25

Divide each side by '16'.
r2 = 1.5625

Simplifying
r2 = 1.5625

Take the square root of each side:
r = {-1.25, 1.25}