19=3+s^2

Solution for 19=3+s^2 equation:

Simplifying
19 = 3 + s2

Solving
19 = 3 + s2

Solving for variable 's'.

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

Add '-1s2' to each side of the equation.
19 + -1s2 = 3 + s2 + -1s2

Combine like terms: s2 + -1s2 = 0
19 + -1s2 = 3 + 0
19 + -1s2 = 3

Add '-19' to each side of the equation.
19 + -19 + -1s2 = 3 + -19

Combine like terms: 19 + -19 = 0
0 + -1s2 = 3 + -19
-1s2 = 3 + -19

Combine like terms: 3 + -19 = -16
-1s2 = -16

Divide each side by '-1'.
s2 = 16

Simplifying
s2 = 16

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