-X^2-16X^2+64=0

Solution for -X^2-16X^2+64=0 equation:

Simplifying
-1X2 + -16X2 + 64 = 0

Reorder the terms:
64 + -1X2 + -16X2 = 0

Combine like terms: -1X2 + -16X2 = -17X2
64 + -17X2 = 0

Solving
64 + -17X2 = 0

Solving for variable 'X'.

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

Add '-64' to each side of the equation.
64 + -64 + -17X2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -17X2 = 0 + -64
-17X2 = 0 + -64

Combine like terms: 0 + -64 = -64
-17X2 = -64

Divide each side by '-17'.
X2 = 3.764705882

Simplifying
X2 = 3.764705882

Take the square root of each side:
X = {-1.940285, 1.940285}