90=3x^2+6

Solution for 90=3x^2+6 equation:

Simplifying
90 = 3x2 + 6

Reorder the terms:
90 = 6 + 3x2

Solving
90 = 6 + 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.
90 + -3x2 = 6 + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
90 + -3x2 = 6 + 0
90 + -3x2 = 6

Add '-90' to each side of the equation.
90 + -90 + -3x2 = 6 + -90

Combine like terms: 90 + -90 = 0
0 + -3x2 = 6 + -90
-3x2 = 6 + -90

Combine like terms: 6 + -90 = -84
-3x2 = -84

Divide each side by '-3'.
x2 = 28

Simplifying
x2 = 28

Take the square root of each side:
x = {-5.291502622, 5.291502622}