(3v^2-v-2)+(7v^2-4v+5)=0

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Solution for (3v^2-v-2)+(7v^2-4v+5)=0 equation:


Simplifying
(3v2 + -1v + -2) + (7v2 + -4v + 5) = 0

Reorder the terms:
(-2 + -1v + 3v2) + (7v2 + -4v + 5) = 0

Remove parenthesis around (-2 + -1v + 3v2)
-2 + -1v + 3v2 + (7v2 + -4v + 5) = 0

Reorder the terms:
-2 + -1v + 3v2 + (5 + -4v + 7v2) = 0

Remove parenthesis around (5 + -4v + 7v2)
-2 + -1v + 3v2 + 5 + -4v + 7v2 = 0

Reorder the terms:
-2 + 5 + -1v + -4v + 3v2 + 7v2 = 0

Combine like terms: -2 + 5 = 3
3 + -1v + -4v + 3v2 + 7v2 = 0

Combine like terms: -1v + -4v = -5v
3 + -5v + 3v2 + 7v2 = 0

Combine like terms: 3v2 + 7v2 = 10v2
3 + -5v + 10v2 = 0

Solving
3 + -5v + 10v2 = 0

Solving for variable 'v'.

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

Divide each side by '10'.
0.3 + -0.5v + v2 = 0.0

Move the constant term to the right:

Add '-0.3' to each side of the equation.
0.3 + -0.5v + -0.3 + v2 = 0.0 + -0.3

Reorder the terms:
0.3 + -0.3 + -0.5v + v2 = 0.0 + -0.3

Combine like terms: 0.3 + -0.3 = 0.0
0.0 + -0.5v + v2 = 0.0 + -0.3
-0.5v + v2 = 0.0 + -0.3

Combine like terms: 0.0 + -0.3 = -0.3
-0.5v + v2 = -0.3

The v term is -0.5v.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5v + 0.0625 + v2 = -0.3 + 0.0625

Reorder the terms:
0.0625 + -0.5v + v2 = -0.3 + 0.0625

Combine like terms: -0.3 + 0.0625 = -0.2375
0.0625 + -0.5v + v2 = -0.2375

Factor a perfect square on the left side:
(v + -0.25)(v + -0.25) = -0.2375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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