-49w^2+81=0

Solution for -49w^2+81=0 equation:

Simplifying
-49w2 + 81 = 0

Reorder the terms:
81 + -49w2 = 0

Solving
81 + -49w2 = 0

Solving for variable 'w'.

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

Add '-81' to each side of the equation.
81 + -81 + -49w2 = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -49w2 = 0 + -81
-49w2 = 0 + -81

Combine like terms: 0 + -81 = -81
-49w2 = -81

Divide each side by '-49'.
w2 = 1.653061224

Simplifying
w2 = 1.653061224

Take the square root of each side:
w = {-1.285714286, 1.285714286}