8x^2-4=28

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Solution for 8x^2-4=28 equation: 


Simplifying
8x2 + -4 = 28

Reorder the terms:
-4 + 8x2 = 28

Solving
-4 + 8x2 = 28

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 8x2 = 28 + 4

Combine like terms: -4 + 4 = 0
0 + 8x2 = 28 + 4
8x2 = 28 + 4

Combine like terms: 28 + 4 = 32
8x2 = 32

Divide each side by '8'.
x2 = 4

Simplifying
x2 = 4

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

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