10+3n+n^2+8n+9n^2+2n=

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Solution for 10+3n+n^2+8n+9n^2+2n= equation:


Simplifying
10 + 3n + n2 + 8n + 9n2 + 2n = 0

Reorder the terms:
10 + 3n + 8n + 2n + n2 + 9n2 = 0

Combine like terms: 3n + 8n = 11n
10 + 11n + 2n + n2 + 9n2 = 0

Combine like terms: 11n + 2n = 13n
10 + 13n + n2 + 9n2 = 0

Combine like terms: n2 + 9n2 = 10n2
10 + 13n + 10n2 = 0

Solving
10 + 13n + 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 + 1.3n + n2 = 0.0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 1.3n + -1 + n2 = 0.0 + -1

Reorder the terms:
1 + -1 + 1.3n + n2 = 0.0 + -1

Combine like terms: 1 + -1 = 0
0 + 1.3n + n2 = 0.0 + -1
1.3n + n2 = 0.0 + -1

Combine like terms: 0.0 + -1 = -1
1.3n + n2 = -1

The n term is 1.3n.  Take half its coefficient (0.65).
Square it (0.4225) and add it to both sides.

Add '0.4225' to each side of the equation.
1.3n + 0.4225 + n2 = -1 + 0.4225

Reorder the terms:
0.4225 + 1.3n + n2 = -1 + 0.4225

Combine like terms: -1 + 0.4225 = -0.5775
0.4225 + 1.3n + n2 = -0.5775

Factor a perfect square on the left side:
(n + 0.65)(n + 0.65) = -0.5775

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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