(-9v^2+8v-5)-(4v^2-3v-7)+(-7v^2-7v-9)=

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Solution for (-9v^2+8v-5)-(4v^2-3v-7)+(-7v^2-7v-9)= equation:


Simplifying
(-9v2 + 8v + -5) + -1(4v2 + -3v + -7) + (-7v2 + -7v + -9) = 0

Reorder the terms:
(-5 + 8v + -9v2) + -1(4v2 + -3v + -7) + (-7v2 + -7v + -9) = 0

Remove parenthesis around (-5 + 8v + -9v2)
-5 + 8v + -9v2 + -1(4v2 + -3v + -7) + (-7v2 + -7v + -9) = 0

Reorder the terms:
-5 + 8v + -9v2 + -1(-7 + -3v + 4v2) + (-7v2 + -7v + -9) = 0
-5 + 8v + -9v2 + (-7 * -1 + -3v * -1 + 4v2 * -1) + (-7v2 + -7v + -9) = 0
-5 + 8v + -9v2 + (7 + 3v + -4v2) + (-7v2 + -7v + -9) = 0

Reorder the terms:
-5 + 8v + -9v2 + 7 + 3v + -4v2 + (-9 + -7v + -7v2) = 0

Remove parenthesis around (-9 + -7v + -7v2)
-5 + 8v + -9v2 + 7 + 3v + -4v2 + -9 + -7v + -7v2 = 0

Reorder the terms:
-5 + 7 + -9 + 8v + 3v + -7v + -9v2 + -4v2 + -7v2 = 0

Combine like terms: -5 + 7 = 2
2 + -9 + 8v + 3v + -7v + -9v2 + -4v2 + -7v2 = 0

Combine like terms: 2 + -9 = -7
-7 + 8v + 3v + -7v + -9v2 + -4v2 + -7v2 = 0

Combine like terms: 8v + 3v = 11v
-7 + 11v + -7v + -9v2 + -4v2 + -7v2 = 0

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

Combine like terms: -9v2 + -4v2 = -13v2
-7 + 4v + -13v2 + -7v2 = 0

Combine like terms: -13v2 + -7v2 = -20v2
-7 + 4v + -20v2 = 0

Solving
-7 + 4v + -20v2 = 0

Solving for variable 'v'.

Begin completing the square.  Divide all terms by
-20 the coefficient of the squared term: 

Divide each side by '-20'.
0.35 + -0.2v + v2 = 0.0

Move the constant term to the right:

Add '-0.35' to each side of the equation.
0.35 + -0.2v + -0.35 + v2 = 0.0 + -0.35

Reorder the terms:
0.35 + -0.35 + -0.2v + v2 = 0.0 + -0.35

Combine like terms: 0.35 + -0.35 = 0.00
0.00 + -0.2v + v2 = 0.0 + -0.35
-0.2v + v2 = 0.0 + -0.35

Combine like terms: 0.0 + -0.35 = -0.35
-0.2v + v2 = -0.35

The v term is -0.2v.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2v + 0.01 + v2 = -0.35 + 0.01

Reorder the terms:
0.01 + -0.2v + v2 = -0.35 + 0.01

Combine like terms: -0.35 + 0.01 = -0.34
0.01 + -0.2v + v2 = -0.34

Factor a perfect square on the left side:
(v + -0.1)(v + -0.1) = -0.34

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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