-49z^2+81=0

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

Simplifying
-49z2 + 81 = 0

Reorder the terms:
81 + -49z2 = 0

Solving
81 + -49z2 = 0

Solving for variable 'z'.

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

Add '-81' to each side of the equation.
81 + -81 + -49z2 = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -49z2 = 0 + -81
-49z2 = 0 + -81

Combine like terms: 0 + -81 = -81
-49z2 = -81

Divide each side by '-49'.
z2 = 1.653061224

Simplifying
z2 = 1.653061224

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