49-81x^2=

Solution for 49-81x^2= equation:

Simplifying
49 + -81x2 = 0

Solving
49 + -81x2 = 0

Solving for variable 'x'.

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

Add '-49' to each side of the equation.
49 + -49 + -81x2 = 0 + -49

Combine like terms: 49 + -49 = 0
0 + -81x2 = 0 + -49
-81x2 = 0 + -49

Combine like terms: 0 + -49 = -49
-81x2 = -49

Divide each side by '-81'.
x2 = 0.6049382716

Simplifying
x2 = 0.6049382716

Take the square root of each side:
x = {-0.777777778, 0.777777778}