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Simplifying
81n2 + -10 = 90
Reorder the terms:
-10 + 81n2 = 90
Solving
-10 + 81n2 = 90
Solving for variable 'n'.
Move all terms containing n to the left, all other terms to the right.
Add '10' to each side of the equation.
-10 + 10 + 81n2 = 90 + 10
Combine like terms: -10 + 10 = 0
0 + 81n2 = 90 + 10
81n2 = 90 + 10
Combine like terms: 90 + 10 = 100
81n2 = 100
Divide each side by '81'.
n2 = 1.234567901
Simplifying
n2 = 1.234567901
Take the square root of each side:
n = {-1.111111111, 1.111111111}
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