(9n^2+5n)+(n^2+6n+12)=

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Solution for (9n^2+5n)+(n^2+6n+12)= equation:


Simplifying
(9n2 + 5n) + (n2 + 6n + 12) = 0

Reorder the terms:
(5n + 9n2) + (n2 + 6n + 12) = 0

Remove parenthesis around (5n + 9n2)
5n + 9n2 + (n2 + 6n + 12) = 0

Reorder the terms:
5n + 9n2 + (12 + 6n + n2) = 0

Remove parenthesis around (12 + 6n + n2)
5n + 9n2 + 12 + 6n + n2 = 0

Reorder the terms:
12 + 5n + 6n + 9n2 + n2 = 0

Combine like terms: 5n + 6n = 11n
12 + 11n + 9n2 + n2 = 0

Combine like terms: 9n2 + n2 = 10n2
12 + 11n + 10n2 = 0

Solving
12 + 11n + 10n2 = 0

Solving for variable 'n'.

Begin completing the square.  Divide all terms by
10 the coefficient of the squared term: 

Divide each side by '10'.
1.2 + 1.1n + n2 = 0.0

Move the constant term to the right:

Add '-1.2' to each side of the equation.
1.2 + 1.1n + -1.2 + n2 = 0.0 + -1.2

Reorder the terms:
1.2 + -1.2 + 1.1n + n2 = 0.0 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + 1.1n + n2 = 0.0 + -1.2
1.1n + n2 = 0.0 + -1.2

Combine like terms: 0.0 + -1.2 = -1.2
1.1n + n2 = -1.2

The n term is 1.1n.  Take half its coefficient (0.55).
Square it (0.3025) and add it to both sides.

Add '0.3025' to each side of the equation.
1.1n + 0.3025 + n2 = -1.2 + 0.3025

Reorder the terms:
0.3025 + 1.1n + n2 = -1.2 + 0.3025

Combine like terms: -1.2 + 0.3025 = -0.8975
0.3025 + 1.1n + n2 = -0.8975

Factor a perfect square on the left side:
(n + 0.55)(n + 0.55) = -0.8975

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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