18v^2+18v-5=0

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Solution for 18v^2+18v-5=0 equation:


Simplifying
18v2 + 18v + -5 = 0

Reorder the terms:
-5 + 18v + 18v2 = 0

Solving
-5 + 18v + 18v2 = 0

Solving for variable 'v'.

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

Divide each side by '18'.
-0.2777777778 + v + v2 = 0

Move the constant term to the right:

Add '0.2777777778' to each side of the equation.
-0.2777777778 + v + 0.2777777778 + v2 = 0 + 0.2777777778

Reorder the terms:
-0.2777777778 + 0.2777777778 + v + v2 = 0 + 0.2777777778

Combine like terms: -0.2777777778 + 0.2777777778 = 0.0000000000
0.0000000000 + v + v2 = 0 + 0.2777777778
v + v2 = 0 + 0.2777777778

Combine like terms: 0 + 0.2777777778 = 0.2777777778
v + v2 = 0.2777777778

The v term is v.  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.
 + 0.25 + v2 = 0.2777777778 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + v2 = 0.2777777778 + 0.25

Combine like terms: 0.2777777778 + 0.25 = 0.5277777778
1.25 + v2 = 0.5277777778

Factor a perfect square on the left side:
(v + 0.5)(v + 0.5) = 0.5277777778

Calculate the square root of the right side: 0.726483157

Break this problem into two subproblems by setting 
(v + 0.5) equal to 0.726483157 and -0.726483157.

Subproblem 1

v + 0.5 = 0.726483157 Simplifying v + 0.5 = 0.726483157 Reorder the terms: 0.5 + v = 0.726483157 Solving 0.5 + v = 0.726483157 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + v = 0.726483157 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + v = 0.726483157 + -0.5 v = 0.726483157 + -0.5 Combine like terms: 0.726483157 + -0.5 = 0.226483157 v = 0.226483157 Simplifying v = 0.226483157

Subproblem 2

v + 0.5 = -0.726483157 Simplifying v + 0.5 = -0.726483157 Reorder the terms: 0.5 + v = -0.726483157 Solving 0.5 + v = -0.726483157 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + v = -0.726483157 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + v = -0.726483157 + -0.5 v = -0.726483157 + -0.5 Combine like terms: -0.726483157 + -0.5 = -1.226483157 v = -1.226483157 Simplifying v = -1.226483157

Solution

The solution to the problem is based on the solutions from the subproblems. v = {0.226483157, -1.226483157}

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