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Simplifying
5n2 + -18 = 0
Reorder the terms:
-18 + 5n2 = 0
Solving
-18 + 5n2 = 0
Solving for variable 'n'.
Move all terms containing n to the left, all other terms to the right.
Add '18' to each side of the equation.
-18 + 18 + 5n2 = 0 + 18
Combine like terms: -18 + 18 = 0
0 + 5n2 = 0 + 18
5n2 = 0 + 18
Combine like terms: 0 + 18 = 18
5n2 = 18
Divide each side by '5'.
n2 = 3.6
Simplifying
n2 = 3.6
Take the square root of each side:
n = {-1.897366596, 1.897366596}
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