21n^2+112-448=0

Solution for 21n^2+112-448=0 equation:

Simplifying
21n2 + 112 + -448 = 0

Reorder the terms:
112 + -448 + 21n2 = 0

Combine like terms: 112 + -448 = -336
-336 + 21n2 = 0

Solving
-336 + 21n2 = 0

Solving for variable 'n'.

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

Add '336' to each side of the equation.
-336 + 336 + 21n2 = 0 + 336

Combine like terms: -336 + 336 = 0
0 + 21n2 = 0 + 336
21n2 = 0 + 336

Combine like terms: 0 + 336 = 336
21n2 = 336

Divide each side by '21'.
n2 = 16

Simplifying
n2 = 16

Take the square root of each side:
n = {-4, 4}