4x^2+12x-185=0

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Solution for 4x^2+12x-185=0 equation:


Simplifying
4x2 + 12x + -185 = 0

Reorder the terms:
-185 + 12x + 4x2 = 0

Solving
-185 + 12x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-46.25 + 3x + x2 = 0

Move the constant term to the right:

Add '46.25' to each side of the equation.
-46.25 + 3x + 46.25 + x2 = 0 + 46.25

Reorder the terms:
-46.25 + 46.25 + 3x + x2 = 0 + 46.25

Combine like terms: -46.25 + 46.25 = 0.00
0.00 + 3x + x2 = 0 + 46.25
3x + x2 = 0 + 46.25

Combine like terms: 0 + 46.25 = 46.25
3x + x2 = 46.25

The x term is 3x.  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.
3x + 2.25 + x2 = 46.25 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 46.25 + 2.25

Combine like terms: 46.25 + 2.25 = 48.5
2.25 + 3x + x2 = 48.5

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 48.5

Calculate the square root of the right side: 6.964194139

Break this problem into two subproblems by setting 
(x + 1.5) equal to 6.964194139 and -6.964194139.

Subproblem 1

x + 1.5 = 6.964194139 Simplifying x + 1.5 = 6.964194139 Reorder the terms: 1.5 + x = 6.964194139 Solving 1.5 + x = 6.964194139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 6.964194139 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 6.964194139 + -1.5 x = 6.964194139 + -1.5 Combine like terms: 6.964194139 + -1.5 = 5.464194139 x = 5.464194139 Simplifying x = 5.464194139

Subproblem 2

x + 1.5 = -6.964194139 Simplifying x + 1.5 = -6.964194139 Reorder the terms: 1.5 + x = -6.964194139 Solving 1.5 + x = -6.964194139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -6.964194139 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -6.964194139 + -1.5 x = -6.964194139 + -1.5 Combine like terms: -6.964194139 + -1.5 = -8.464194139 x = -8.464194139 Simplifying x = -8.464194139

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.464194139, -8.464194139}

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