25=x^2+2x^2

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

Simplifying
25 = x2 + 2x2

Combine like terms: x2 + 2x2 = 3x2
25 = 3x2

Solving
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.
25 + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
25 + -3x2 = 0

Add '-25' to each side of the equation.
25 + -25 + -3x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -3x2 = 0 + -25
-3x2 = 0 + -25

Combine like terms: 0 + -25 = -25
-3x2 = -25

Divide each side by '-3'.
x2 = 8.333333333

Simplifying
x2 = 8.333333333

Take the square root of each side:
x = {-2.886751346, 2.886751346}