5v^2+4v+5=0

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Solution for 5v^2+4v+5=0 equation:


Simplifying
5v2 + 4v + 5 = 0

Reorder the terms:
5 + 4v + 5v2 = 0

Solving
5 + 4v + 5v2 = 0

Solving for variable 'v'.

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

Divide each side by '5'.
1 + 0.8v + v2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 0.8v + -1 + v2 = 0 + -1

Reorder the terms:
1 + -1 + 0.8v + v2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 0.8v + v2 = 0 + -1
0.8v + v2 = 0 + -1

Combine like terms: 0 + -1 = -1
0.8v + v2 = -1

The v term is 0.8v.  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.
0.8v + 0.16 + v2 = -1 + 0.16

Reorder the terms:
0.16 + 0.8v + v2 = -1 + 0.16

Combine like terms: -1 + 0.16 = -0.84
0.16 + 0.8v + v2 = -0.84

Factor a perfect square on the left side:
(v + 0.4)(v + 0.4) = -0.84

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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