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Simplifying
81 + -4x2y2 = 0
Solving
81 + -4x2y2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-81' to each side of the equation.
81 + -81 + -4x2y2 = 0 + -81
Combine like terms: 81 + -81 = 0
0 + -4x2y2 = 0 + -81
-4x2y2 = 0 + -81
Combine like terms: 0 + -81 = -81
-4x2y2 = -81
Divide each side by '-4y2'.
x2 = 20.25y-2
Simplifying
x2 = 20.25y-2
Take the square root of each side:
x = {-4.5y-1, 4.5y-1}
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