(-7v^2+7v-9)+(-5v^2-4v+7)-(-5v^2-2v+9)=

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Solution for (-7v^2+7v-9)+(-5v^2-4v+7)-(-5v^2-2v+9)= equation:


Simplifying
(-7v2 + 7v + -9) + (-5v2 + -4v + 7) + -1(-5v2 + -2v + 9) = 0

Reorder the terms:
(-9 + 7v + -7v2) + (-5v2 + -4v + 7) + -1(-5v2 + -2v + 9) = 0

Remove parenthesis around (-9 + 7v + -7v2)
-9 + 7v + -7v2 + (-5v2 + -4v + 7) + -1(-5v2 + -2v + 9) = 0

Reorder the terms:
-9 + 7v + -7v2 + (7 + -4v + -5v2) + -1(-5v2 + -2v + 9) = 0

Remove parenthesis around (7 + -4v + -5v2)
-9 + 7v + -7v2 + 7 + -4v + -5v2 + -1(-5v2 + -2v + 9) = 0

Reorder the terms:
-9 + 7v + -7v2 + 7 + -4v + -5v2 + -1(9 + -2v + -5v2) = 0
-9 + 7v + -7v2 + 7 + -4v + -5v2 + (9 * -1 + -2v * -1 + -5v2 * -1) = 0
-9 + 7v + -7v2 + 7 + -4v + -5v2 + (-9 + 2v + 5v2) = 0

Reorder the terms:
-9 + 7 + -9 + 7v + -4v + 2v + -7v2 + -5v2 + 5v2 = 0

Combine like terms: -9 + 7 = -2
-2 + -9 + 7v + -4v + 2v + -7v2 + -5v2 + 5v2 = 0

Combine like terms: -2 + -9 = -11
-11 + 7v + -4v + 2v + -7v2 + -5v2 + 5v2 = 0

Combine like terms: 7v + -4v = 3v
-11 + 3v + 2v + -7v2 + -5v2 + 5v2 = 0

Combine like terms: 3v + 2v = 5v
-11 + 5v + -7v2 + -5v2 + 5v2 = 0

Combine like terms: -7v2 + -5v2 = -12v2
-11 + 5v + -12v2 + 5v2 = 0

Combine like terms: -12v2 + 5v2 = -7v2
-11 + 5v + -7v2 = 0

Solving
-11 + 5v + -7v2 = 0

Solving for variable 'v'.

Begin completing the square.  Divide all terms by
-7 the coefficient of the squared term: 

Divide each side by '-7'.
1.571428571 + -0.7142857143v + v2 = 0

Move the constant term to the right:

Add '-1.571428571' to each side of the equation.
1.571428571 + -0.7142857143v + -1.571428571 + v2 = 0 + -1.571428571

Reorder the terms:
1.571428571 + -1.571428571 + -0.7142857143v + v2 = 0 + -1.571428571

Combine like terms: 1.571428571 + -1.571428571 = 0.000000000
0.000000000 + -0.7142857143v + v2 = 0 + -1.571428571
-0.7142857143v + v2 = 0 + -1.571428571

Combine like terms: 0 + -1.571428571 = -1.571428571
-0.7142857143v + v2 = -1.571428571

The v term is -0.7142857143v.  Take half its coefficient (-0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
-0.7142857143v + 0.1275510204 + v2 = -1.571428571 + 0.1275510204

Reorder the terms:
0.1275510204 + -0.7142857143v + v2 = -1.571428571 + 0.1275510204

Combine like terms: -1.571428571 + 0.1275510204 = -1.4438775506
0.1275510204 + -0.7142857143v + v2 = -1.4438775506

Factor a perfect square on the left side:
(v + -0.3571428572)(v + -0.3571428572) = -1.4438775506

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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