3x^2+23x-5.7=0

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Solution for 3x^2+23x-5.7=0 equation:


Simplifying
3x2 + 23x + -5.7 = 0

Reorder the terms:
-5.7 + 23x + 3x2 = 0

Solving
-5.7 + 23x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-1.9 + 7.666666667x + x2 = 0

Move the constant term to the right:

Add '1.9' to each side of the equation.
-1.9 + 7.666666667x + 1.9 + x2 = 0 + 1.9

Reorder the terms:
-1.9 + 1.9 + 7.666666667x + x2 = 0 + 1.9

Combine like terms: -1.9 + 1.9 = 0.0
0.0 + 7.666666667x + x2 = 0 + 1.9
7.666666667x + x2 = 0 + 1.9

Combine like terms: 0 + 1.9 = 1.9
7.666666667x + x2 = 1.9

The x term is 7.666666667x.  Take half its coefficient (3.833333334).
Square it (14.69444445) and add it to both sides.

Add '14.69444445' to each side of the equation.
7.666666667x + 14.69444445 + x2 = 1.9 + 14.69444445

Reorder the terms:
14.69444445 + 7.666666667x + x2 = 1.9 + 14.69444445

Combine like terms: 1.9 + 14.69444445 = 16.59444445
14.69444445 + 7.666666667x + x2 = 16.59444445

Factor a perfect square on the left side:
(x + 3.833333334)(x + 3.833333334) = 16.59444445

Calculate the square root of the right side: 4.073627922

Break this problem into two subproblems by setting 
(x + 3.833333334) equal to 4.073627922 and -4.073627922.

Subproblem 1

x + 3.833333334 = 4.073627922 Simplifying x + 3.833333334 = 4.073627922 Reorder the terms: 3.833333334 + x = 4.073627922 Solving 3.833333334 + x = 4.073627922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.833333334' to each side of the equation. 3.833333334 + -3.833333334 + x = 4.073627922 + -3.833333334 Combine like terms: 3.833333334 + -3.833333334 = 0.000000000 0.000000000 + x = 4.073627922 + -3.833333334 x = 4.073627922 + -3.833333334 Combine like terms: 4.073627922 + -3.833333334 = 0.240294588 x = 0.240294588 Simplifying x = 0.240294588

Subproblem 2

x + 3.833333334 = -4.073627922 Simplifying x + 3.833333334 = -4.073627922 Reorder the terms: 3.833333334 + x = -4.073627922 Solving 3.833333334 + x = -4.073627922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.833333334' to each side of the equation. 3.833333334 + -3.833333334 + x = -4.073627922 + -3.833333334 Combine like terms: 3.833333334 + -3.833333334 = 0.000000000 0.000000000 + x = -4.073627922 + -3.833333334 x = -4.073627922 + -3.833333334 Combine like terms: -4.073627922 + -3.833333334 = -7.906961256 x = -7.906961256 Simplifying x = -7.906961256

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.240294588, -7.906961256}

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