81x^2-9y^2=

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Solution for 81x^2-9y^2= equation: 


Simplifying
81x2 + -9y2 = 0

Solving
81x2 + -9y2 = 0

Solving for variable 'x'.

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

Add '9y2' to each side of the equation.
81x2 + -9y2 + 9y2 = 0 + 9y2

Combine like terms: -9y2 + 9y2 = 0
81x2 + 0 = 0 + 9y2
81x2 = 0 + 9y2
Remove the zero:
81x2 = 9y2

Divide each side by '81'.
x2 = 0.1111111111y2

Simplifying
x2 = 0.1111111111y2

Take the square root of each side:
x = {-0.333333333y, 0.333333333y}

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