0=-16x^2+256

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Solution for 0=-16x^2+256 equation: 


Simplifying
0 = -16x2 + 256

Reorder the terms:
0 = 256 + -16x2

Solving
0 = 256 + -16x2

Solving for variable 'x'.

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

Add '16x2' to each side of the equation.
0 + 16x2 = 256 + -16x2 + 16x2
Remove the zero:
16x2 = 256 + -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
16x2 = 256 + 0
16x2 = 256

Divide each side by '16'.
x2 = 16

Simplifying
x2 = 16

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

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