4x^2-x^2-4=0

Solution for 4x^2-x^2-4=0 equation:

Simplifying
4x2 + -1x2 + -4 = 0

Reorder the terms:
-4 + 4x2 + -1x2 = 0

Combine like terms: 4x2 + -1x2 = 3x2
-4 + 3x2 = 0

Solving
-4 + 3x2 = 0

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 3x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 3x2 = 0 + 4
3x2 = 0 + 4

Combine like terms: 0 + 4 = 4
3x2 = 4

Divide each side by '3'.
x2 = 1.333333333

Simplifying
x2 = 1.333333333

Take the square root of each side:
x = {-1.154700538, 1.154700538}