-0.0009x^2+4=

Solution for -0.0009x^2+4= equation:

Simplifying
-0.0009x2 + 4 = 0

Reorder the terms:
4 + -0.0009x2 = 0

Solving
4 + -0.0009x2 = 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 + -0.0009x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -0.0009x2 = 0 + -4
-0.0009x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-0.0009x2 = -4

Divide each side by '-0.0009'.
x2 = 4444.444444

Simplifying
x2 = 4444.444444

Take the square root of each side:
x = {-66.666666663, 66.666666663}