3D^2=12

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Solution for 3D^2=12 equation: 


Simplifying
3D2 = 12

Solving
3D2 = 12

Solving for variable 'D'.

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

Divide each side by '3'.
D2 = 4

Simplifying
D2 = 4

Take the square root of each side:
D = {-2, 2}

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