85=x^2(3)

Solution for 85=x^2(3) equation:

Simplifying
85 = x2(3)

Reorder the terms for easier multiplication:
85 = 3x2

Solving
85 = 3x2

Solving for variable 'x'.

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

Add '-3x2' to each side of the equation.
85 + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
85 + -3x2 = 0

Add '-85' to each side of the equation.
85 + -85 + -3x2 = 0 + -85

Combine like terms: 85 + -85 = 0
0 + -3x2 = 0 + -85
-3x2 = 0 + -85

Combine like terms: 0 + -85 = -85
-3x2 = -85

Divide each side by '-3'.
x2 = 28.33333333

Simplifying
x2 = 28.33333333

Take the square root of each side:
x = {-5.322906474, 5.322906474}