A^2+3=19

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Solution for A^2+3=19 equation: 


Simplifying
A2 + 3 = 19

Reorder the terms:
3 + A2 = 19

Solving
3 + A2 = 19

Solving for variable 'A'.

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

Add '-3' to each side of the equation.
3 + -3 + A2 = 19 + -3

Combine like terms: 3 + -3 = 0
0 + A2 = 19 + -3
A2 = 19 + -3

Combine like terms: 19 + -3 = 16
A2 = 16

Simplifying
A2 = 16

Take the square root of each side:
A = {-4, 4}

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