(.2x^2)+1.2=3.4

Solution for (.2x^2)+1.2=3.4 equation:

Simplifying
(0.2x2) + 1.2 = 3.4

Reorder the terms:
1.2 + (0.2x2) = 3.4

Solving
1.2 + (0.2x2) = 3.4

Solving for variable 'x'.

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

Add '-1.2' to each side of the equation.
1.2 + -1.2 + (0.2x2) = 3.4 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + (0.2x2) = 3.4 + -1.2
(0.2x2) = 3.4 + -1.2

Combine like terms: 3.4 + -1.2 = 2.2
(0.2x2) = 2.2

Divide each side by '0.2'.
x2 = 11

Simplifying
x2 = 11

Take the square root of each side:
x = {-3.31662479, 3.31662479}