12x^2-42=0

Solution for 12x^2-42=0 equation:

Simplifying
12x2 + -42 = 0

Reorder the terms:
-42 + 12x2 = 0

Solving
-42 + 12x2 = 0

Solving for variable 'x'.

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

Add '42' to each side of the equation.
-42 + 42 + 12x2 = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 12x2 = 0 + 42
12x2 = 0 + 42

Combine like terms: 0 + 42 = 42
12x2 = 42

Divide each side by '12'.
x2 = 3.5

Simplifying
x2 = 3.5

Take the square root of each side:
x = {-1.870828693, 1.870828693}