x^2-28=0

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Solution for x^2-28=0 equation: 


Simplifying
x2 + -28 = 0

Reorder the terms:
-28 + x2 = 0

Solving
-28 + x2 = 0

Solving for variable 'x'.

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

Add '28' to each side of the equation.
-28 + 28 + x2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + x2 = 0 + 28
x2 = 0 + 28

Combine like terms: 0 + 28 = 28
x2 = 28

Simplifying
x2 = 28

Take the square root of each side:
x = {-5.291502622, 5.291502622}

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