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Simplifying
12 = 4x2 + -8
Reorder the terms:
12 = -8 + 4x2
Solving
12 = -8 + 4x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-4x2' to each side of the equation.
12 + -4x2 = -8 + 4x2 + -4x2
Combine like terms: 4x2 + -4x2 = 0
12 + -4x2 = -8 + 0
12 + -4x2 = -8
Add '-12' to each side of the equation.
12 + -12 + -4x2 = -8 + -12
Combine like terms: 12 + -12 = 0
0 + -4x2 = -8 + -12
-4x2 = -8 + -12
Combine like terms: -8 + -12 = -20
-4x2 = -20
Divide each side by '-4'.
x2 = 5
Simplifying
x2 = 5
Take the square root of each side:
x = {-2.236067978, 2.236067978}
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