(7v^2-3v-1)+(2v^2-6v+5)=

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Solution for (7v^2-3v-1)+(2v^2-6v+5)= equation:


Simplifying
(7v2 + -3v + -1) + (2v2 + -6v + 5) = 0

Reorder the terms:
(-1 + -3v + 7v2) + (2v2 + -6v + 5) = 0

Remove parenthesis around (-1 + -3v + 7v2)
-1 + -3v + 7v2 + (2v2 + -6v + 5) = 0

Reorder the terms:
-1 + -3v + 7v2 + (5 + -6v + 2v2) = 0

Remove parenthesis around (5 + -6v + 2v2)
-1 + -3v + 7v2 + 5 + -6v + 2v2 = 0

Reorder the terms:
-1 + 5 + -3v + -6v + 7v2 + 2v2 = 0

Combine like terms: -1 + 5 = 4
4 + -3v + -6v + 7v2 + 2v2 = 0

Combine like terms: -3v + -6v = -9v
4 + -9v + 7v2 + 2v2 = 0

Combine like terms: 7v2 + 2v2 = 9v2
4 + -9v + 9v2 = 0

Solving
4 + -9v + 9v2 = 0

Solving for variable 'v'.

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

Divide each side by '9'.
0.4444444444 + -1v + v2 = 0

Move the constant term to the right:

Add '-0.4444444444' to each side of the equation.
0.4444444444 + -1v + -0.4444444444 + v2 = 0 + -0.4444444444

Reorder the terms:
0.4444444444 + -0.4444444444 + -1v + v2 = 0 + -0.4444444444

Combine like terms: 0.4444444444 + -0.4444444444 = 0.0000000000
0.0000000000 + -1v + v2 = 0 + -0.4444444444
-1v + v2 = 0 + -0.4444444444

Combine like terms: 0 + -0.4444444444 = -0.4444444444
-1v + v2 = -0.4444444444

The v term is -1v.  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.
-1v + 0.25 + v2 = -0.4444444444 + 0.25

Reorder the terms:
0.25 + -1v + v2 = -0.4444444444 + 0.25

Combine like terms: -0.4444444444 + 0.25 = -0.1944444444
0.25 + -1v + v2 = -0.1944444444

Factor a perfect square on the left side:
(v + -0.5)(v + -0.5) = -0.1944444444

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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