9u^2-4x^2=0

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Solution for 9u^2-4x^2=0 equation: 


Simplifying
9u2 + -4x2 = 0

Solving
9u2 + -4x2 = 0

Solving for variable 'u'.

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

Add '4x2' to each side of the equation.
9u2 + -4x2 + 4x2 = 0 + 4x2

Combine like terms: -4x2 + 4x2 = 0
9u2 + 0 = 0 + 4x2
9u2 = 0 + 4x2
Remove the zero:
9u2 = 4x2

Divide each side by '9'.
u2 = 0.4444444444x2

Simplifying
u2 = 0.4444444444x2

Take the square root of each side:
u = {-0.666666667x, 0.666666667x}

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