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Simplifying
10n2 + 4 = 644
Reorder the terms:
4 + 10n2 = 644
Solving
4 + 10n2 = 644
Solving for variable 'n'.
Move all terms containing n to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + 10n2 = 644 + -4
Combine like terms: 4 + -4 = 0
0 + 10n2 = 644 + -4
10n2 = 644 + -4
Combine like terms: 644 + -4 = 640
10n2 = 640
Divide each side by '10'.
n2 = 64
Simplifying
n2 = 64
Take the square root of each side:
n = {-8, 8}
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