2x^2-x^2-3=0

Solution for 2x^2-x^2-3=0 equation:

Simplifying
2x2 + -1x2 + -3 = 0

Reorder the terms:
-3 + 2x2 + -1x2 = 0

Combine like terms: 2x2 + -1x2 = 1x2
-3 + 1x2 = 0

Solving
-3 + 1x2 = 0

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 1x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 1x2 = 0 + 3
1x2 = 0 + 3

Combine like terms: 0 + 3 = 3
1x2 = 3

Divide each side by '1'.
x2 = 3

Simplifying
x2 = 3

Take the square root of each side:
x = {-1.732050808, 1.732050808}