5n^2+8n=4n-12

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Solution for 5n^2+8n=4n-12 equation:


Simplifying
5n2 + 8n = 4n + -12

Reorder the terms:
8n + 5n2 = 4n + -12

Reorder the terms:
8n + 5n2 = -12 + 4n

Solving
8n + 5n2 = -12 + 4n

Solving for variable 'n'.

Reorder the terms:
12 + 8n + -4n + 5n2 = -12 + 4n + 12 + -4n

Combine like terms: 8n + -4n = 4n
12 + 4n + 5n2 = -12 + 4n + 12 + -4n

Reorder the terms:
12 + 4n + 5n2 = -12 + 12 + 4n + -4n

Combine like terms: -12 + 12 = 0
12 + 4n + 5n2 = 0 + 4n + -4n
12 + 4n + 5n2 = 4n + -4n

Combine like terms: 4n + -4n = 0
12 + 4n + 5n2 = 0

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

Divide each side by '5'.
2.4 + 0.8n + n2 = 0

Move the constant term to the right:

Add '-2.4' to each side of the equation.
2.4 + 0.8n + -2.4 + n2 = 0 + -2.4

Reorder the terms:
2.4 + -2.4 + 0.8n + n2 = 0 + -2.4

Combine like terms: 2.4 + -2.4 = 0.0
0.0 + 0.8n + n2 = 0 + -2.4
0.8n + n2 = 0 + -2.4

Combine like terms: 0 + -2.4 = -2.4
0.8n + n2 = -2.4

The n term is 0.8n.  Take half its coefficient (0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
0.8n + 0.16 + n2 = -2.4 + 0.16

Reorder the terms:
0.16 + 0.8n + n2 = -2.4 + 0.16

Combine like terms: -2.4 + 0.16 = -2.24
0.16 + 0.8n + n2 = -2.24

Factor a perfect square on the left side:
(n + 0.4)(n + 0.4) = -2.24

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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