n^2+n=-9

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Solution for n^2+n=-9 equation:


Simplifying
n2 + n = -9

Reorder the terms:
n + n2 = -9

Solving
n + n2 = -9

Solving for variable 'n'.

Reorder the terms:
9 + n + n2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + n + -9 + n2 = 0 + -9

Reorder the terms:
9 + -9 + n + n2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + n + n2 = 0 + -9
n + n2 = 0 + -9

Combine like terms: 0 + -9 = -9
n + n2 = -9

The n term is n.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
n + 0.25 + n2 = -9 + 0.25

Reorder the terms:
0.25 + n + n2 = -9 + 0.25

Combine like terms: -9 + 0.25 = -8.75
0.25 + n + n2 = -8.75

Factor a perfect square on the left side:
(n + 0.5)(n + 0.5) = -8.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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