4(16-x^2)=0

Solution for 4(16-x^2)=0 equation:

Simplifying
4(16 + -1x2) = 0
(16 * 4 + -1x2 * 4) = 0
(64 + -4x2) = 0

Solving
64 + -4x2 = 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 + -4x2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -4x2 = 0 + -64
-4x2 = 0 + -64

Combine like terms: 0 + -64 = -64
-4x2 = -64

Divide each side by '-4'.
x2 = 16

Simplifying
x2 = 16

Take the square root of each side:
x = {-4, 4}