7n^2+21=

Solution for 7n^2+21= equation:

Simplifying
7n2 + 21 = 0

Reorder the terms:
21 + 7n2 = 0

Solving
21 + 7n2 = 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 + 7n2 = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 7n2 = 0 + -21
7n2 = 0 + -21

Combine like terms: 0 + -21 = -21
7n2 = -21

Divide each side by '7'.
n2 = -3

Simplifying
n2 = -3

Reorder the terms:
3 + n2 = -3 + 3

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

The solution to this equation could not be determined.