16k^2-81=0factor

Solution for 16k^2-81=0factor equation:

Simplifying
16k2 + -81 = 0factor

Reorder the terms:
-81 + 16k2 = 0factor

Anything times zero is zero.
-81 + 16k2 = 0acfort

Solving
-81 + 16k2 = 0

Solving for variable 'k'.

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

Add '81' to each side of the equation.
-81 + 81 + 16k2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + 16k2 = 0 + 81
16k2 = 0 + 81

Combine like terms: 0 + 81 = 81
16k2 = 81

Divide each side by '16'.
k2 = 5.0625

Simplifying
k2 = 5.0625

Take the square root of each side:
k = {-2.25, 2.25}