-2x^2+4+1=0

Solution for -2x^2+4+1=0 equation:

Simplifying
-2x2 + 4 + 1 = 0

Reorder the terms:
4 + 1 + -2x2 = 0

Combine like terms: 4 + 1 = 5
5 + -2x2 = 0

Solving
5 + -2x2 = 0

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + -2x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -2x2 = 0 + -5
-2x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-2x2 = -5

Divide each side by '-2'.
x2 = 2.5

Simplifying
x2 = 2.5

Take the square root of each side:
x = {-1.58113883, 1.58113883}