4.2=x^2

Solution for 4.2=x^2 equation:

Simplifying
4.2 = x2

Solving
4.2 = x2

Solving for variable 'x'.

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

Add '-1x2' to each side of the equation.
4.2 + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
4.2 + -1x2 = 0

Add '-4.2' to each side of the equation.
4.2 + -4.2 + -1x2 = 0 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + -1x2 = 0 + -4.2
-1x2 = 0 + -4.2

Combine like terms: 0 + -4.2 = -4.2
-1x2 = -4.2

Divide each side by '-1'.
x2 = 4.2

Simplifying
x2 = 4.2

Take the square root of each side:
x = {-2.049390153, 2.049390153}