5n+n^2+420=0

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Solution for 5n+n^2+420=0 equation:


Simplifying
5n + n2 + 420 = 0

Reorder the terms:
420 + 5n + n2 = 0

Solving
420 + 5n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '-420' to each side of the equation.
420 + 5n + -420 + n2 = 0 + -420

Reorder the terms:
420 + -420 + 5n + n2 = 0 + -420

Combine like terms: 420 + -420 = 0
0 + 5n + n2 = 0 + -420
5n + n2 = 0 + -420

Combine like terms: 0 + -420 = -420
5n + n2 = -420

The n term is 5n.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5n + 6.25 + n2 = -420 + 6.25

Reorder the terms:
6.25 + 5n + n2 = -420 + 6.25

Combine like terms: -420 + 6.25 = -413.75
6.25 + 5n + n2 = -413.75

Factor a perfect square on the left side:
(n + 2.5)(n + 2.5) = -413.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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