0=c^2-4

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Solution for 0=c^2-4 equation: 


Simplifying
0 = c2 + -4

Reorder the terms:
0 = -4 + c2

Solving
0 = -4 + c2

Solving for variable 'c'.

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

Add '-1c2' to each side of the equation.
0 + -1c2 = -4 + c2 + -1c2
Remove the zero:
-1c2 = -4 + c2 + -1c2

Combine like terms: c2 + -1c2 = 0
-1c2 = -4 + 0
-1c2 = -4

Divide each side by '-1'.
c2 = 4

Simplifying
c2 = 4

Take the square root of each side:
c = {-2, 2}

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