v^2+3v-12=0

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Solution for v^2+3v-12=0 equation:


Simplifying
v2 + 3v + -12 = 0

Reorder the terms:
-12 + 3v + v2 = 0

Solving
-12 + 3v + v2 = 0

Solving for variable 'v'.

Begin completing the square.

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + 3v + 12 + v2 = 0 + 12

Reorder the terms:
-12 + 12 + 3v + v2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 3v + v2 = 0 + 12
3v + v2 = 0 + 12

Combine like terms: 0 + 12 = 12
3v + v2 = 12

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 = 12 + 2.25

Reorder the terms:
2.25 + 3v + v2 = 12 + 2.25

Combine like terms: 12 + 2.25 = 14.25
2.25 + 3v + v2 = 14.25

Factor a perfect square on the left side:
(v + 1.5)(v + 1.5) = 14.25

Calculate the square root of the right side: 3.774917218

Break this problem into two subproblems by setting 
(v + 1.5) equal to 3.774917218 and -3.774917218.

Subproblem 1

v + 1.5 = 3.774917218 Simplifying v + 1.5 = 3.774917218 Reorder the terms: 1.5 + v = 3.774917218 Solving 1.5 + v = 3.774917218 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 = 3.774917218 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + v = 3.774917218 + -1.5 v = 3.774917218 + -1.5 Combine like terms: 3.774917218 + -1.5 = 2.274917218 v = 2.274917218 Simplifying v = 2.274917218

Subproblem 2

v + 1.5 = -3.774917218 Simplifying v + 1.5 = -3.774917218 Reorder the terms: 1.5 + v = -3.774917218 Solving 1.5 + v = -3.774917218 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 = -3.774917218 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + v = -3.774917218 + -1.5 v = -3.774917218 + -1.5 Combine like terms: -3.774917218 + -1.5 = -5.274917218 v = -5.274917218 Simplifying v = -5.274917218

Solution

The solution to the problem is based on the solutions from the subproblems. v = {2.274917218, -5.274917218}

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