v^2-3v+1=0

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Solution for v^2-3v+1=0 equation:


Simplifying
v2 + -3v + 1 = 0

Reorder the terms:
1 + -3v + v2 = 0

Solving
1 + -3v + v2 = 0

Solving for variable 'v'.

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -3v + -1 + v2 = 0 + -1

Reorder the terms:
1 + -1 + -3v + v2 = 0 + -1

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

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

The v term is -3v.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3v + 2.25 + v2 = -1 + 2.25

Reorder the terms:
2.25 + -3v + v2 = -1 + 2.25

Combine like terms: -1 + 2.25 = 1.25
2.25 + -3v + v2 = 1.25

Factor a perfect square on the left side:
(v + -1.5)(v + -1.5) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(v + -1.5) equal to 1.118033989 and -1.118033989.

Subproblem 1

v + -1.5 = 1.118033989 Simplifying v + -1.5 = 1.118033989 Reorder the terms: -1.5 + v = 1.118033989 Solving -1.5 + v = 1.118033989 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + v = 1.118033989 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + v = 1.118033989 + 1.5 v = 1.118033989 + 1.5 Combine like terms: 1.118033989 + 1.5 = 2.618033989 v = 2.618033989 Simplifying v = 2.618033989

Subproblem 2

v + -1.5 = -1.118033989 Simplifying v + -1.5 = -1.118033989 Reorder the terms: -1.5 + v = -1.118033989 Solving -1.5 + v = -1.118033989 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + v = -1.118033989 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + v = -1.118033989 + 1.5 v = -1.118033989 + 1.5 Combine like terms: -1.118033989 + 1.5 = 0.381966011 v = 0.381966011 Simplifying v = 0.381966011

Solution

The solution to the problem is based on the solutions from the subproblems. v = {2.618033989, 0.381966011}

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