0.4v^2+0.7v=0.3v-2

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Solution for 0.4v^2+0.7v=0.3v-2 equation:


Simplifying
0.4v2 + 0.7v = 0.3v + -2

Reorder the terms:
0.7v + 0.4v2 = 0.3v + -2

Reorder the terms:
0.7v + 0.4v2 = -2 + 0.3v

Solving
0.7v + 0.4v2 = -2 + 0.3v

Solving for variable 'v'.

Reorder the terms:
2 + 0.7v + -0.3v + 0.4v2 = -2 + 0.3v + 2 + -0.3v

Combine like terms: 0.7v + -0.3v = 0.4v
2 + 0.4v + 0.4v2 = -2 + 0.3v + 2 + -0.3v

Reorder the terms:
2 + 0.4v + 0.4v2 = -2 + 2 + 0.3v + -0.3v

Combine like terms: -2 + 2 = 0
2 + 0.4v + 0.4v2 = 0 + 0.3v + -0.3v
2 + 0.4v + 0.4v2 = 0.3v + -0.3v

Combine like terms: 0.3v + -0.3v = 0.0
2 + 0.4v + 0.4v2 = 0.0

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

Divide each side by '0.4'.
5 + v + v2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + v + -5 + v2 = 0 + -5

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

Combine like terms: 5 + -5 = 0
0 + v + v2 = 0 + -5
v + v2 = 0 + -5

Combine like terms: 0 + -5 = -5
v + v2 = -5

The v term is v.  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.
 + 0.25 + v2 = -5 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + v2 = -5 + 0.25

Combine like terms: -5 + 0.25 = -4.75
1.25 + v2 = -4.75

Factor a perfect square on the left side:
(v + 0.5)(v + 0.5) = -4.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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