4x^2-42=0

Solution for 4x^2-42=0 equation:

Simplifying
4x2 + -42 = 0

Reorder the terms:
-42 + 4x2 = 0

Solving
-42 + 4x2 = 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 + 4x2 = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 4x2 = 0 + 42
4x2 = 0 + 42

Combine like terms: 0 + 42 = 42
4x2 = 42

Divide each side by '4'.
x2 = 10.5

Simplifying
x2 = 10.5

Take the square root of each side:
x = {-3.240370349, 3.240370349}