3n^2+9-30=0

Solution for 3n^2+9-30=0 equation:

Simplifying
3n2 + 9 + -30 = 0

Reorder the terms:
9 + -30 + 3n2 = 0

Combine like terms: 9 + -30 = -21
-21 + 3n2 = 0

Solving
-21 + 3n2 = 0

Solving for variable 'n'.

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

Add '21' to each side of the equation.
-21 + 21 + 3n2 = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 3n2 = 0 + 21
3n2 = 0 + 21

Combine like terms: 0 + 21 = 21
3n2 = 21

Divide each side by '3'.
n2 = 7

Simplifying
n2 = 7

Take the square root of each side:
n = {-2.645751311, 2.645751311}