20x^2=400

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Solution for 20x^2=400 equation: 


Simplifying
20x2 = 400

Solving
20x2 = 400

Solving for variable 'x'.

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

Divide each side by '20'.
x2 = 20

Simplifying
x2 = 20

Take the square root of each side:
x = {-4.472135955, 4.472135955}

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