9K^2-21=-11

Solution for 9K^2-21=-11 equation:

Simplifying
9K2 + -21 = -11

Reorder the terms:
-21 + 9K2 = -11

Solving
-21 + 9K2 = -11

Solving for variable 'K'.

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

Add '21' to each side of the equation.
-21 + 21 + 9K2 = -11 + 21

Combine like terms: -21 + 21 = 0
0 + 9K2 = -11 + 21
9K2 = -11 + 21

Combine like terms: -11 + 21 = 10
9K2 = 10

Divide each side by '9'.
K2 = 1.111111111

Simplifying
K2 = 1.111111111

Take the square root of each side:
K = {-1.054092553, 1.054092553}