7x^2-216=0

Solution for 7x^2-216=0 equation:

Simplifying
7x2 + -216 = 0

Reorder the terms:
-216 + 7x2 = 0

Solving
-216 + 7x2 = 0

Solving for variable 'x'.

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

Add '216' to each side of the equation.
-216 + 216 + 7x2 = 0 + 216

Combine like terms: -216 + 216 = 0
0 + 7x2 = 0 + 216
7x2 = 0 + 216

Combine like terms: 0 + 216 = 216
7x2 = 216

Divide each side by '7'.
x2 = 30.85714286

Simplifying
x2 = 30.85714286

Take the square root of each side:
x = {-5.554920599, 5.554920599}