0=9-4u^2

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


Simplifying
0 = 9 + -4u2

Solving
0 = 9 + -4u2

Solving for variable 'u'.

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

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

Combine like terms: -4u2 + 4u2 = 0
4u2 = 9 + 0
4u2 = 9

Divide each side by '4'.
u2 = 2.25

Simplifying
u2 = 2.25

Take the square root of each side:
u = {-1.5, 1.5}

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