.25=x^2+2x^2

Solution for .25=x^2+2x^2 equation:

Simplifying
0.25 = x2 + 2x2

Combine like terms: x2 + 2x2 = 3x2
0.25 = 3x2

Solving
0.25 = 3x2

Solving for variable 'x'.

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

Add '-3x2' to each side of the equation.
0.25 + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
0.25 + -3x2 = 0

Add '-0.25' to each side of the equation.
0.25 + -0.25 + -3x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -3x2 = 0 + -0.25
-3x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-3x2 = -0.25

Divide each side by '-3'.
x2 = 0.08333333333

Simplifying
x2 = 0.08333333333

Take the square root of each side:
x = {-0.288675135, 0.288675135}