a^2=21

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Solution for a^2=21 equation: 


Simplifying
a2 = 21

Solving
a2 = 21

Solving for variable 'a'.

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

Simplifying
a2 = 21

Take the square root of each side:
a = {-4.582575695, 4.582575695}

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