3x^2-39=

Solution for 3x^2-39= equation:

Simplifying
3x2 + -39 = 0

Reorder the terms:
-39 + 3x2 = 0

Solving
-39 + 3x2 = 0

Solving for variable 'x'.

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

Add '39' to each side of the equation.
-39 + 39 + 3x2 = 0 + 39

Combine like terms: -39 + 39 = 0
0 + 3x2 = 0 + 39
3x2 = 0 + 39

Combine like terms: 0 + 39 = 39
3x2 = 39

Divide each side by '3'.
x2 = 13

Simplifying
x2 = 13

Take the square root of each side:
x = {-3.605551275, 3.605551275}