5x+13-3x^2+6x-8=

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Solution for 5x+13-3x^2+6x-8= equation:


Simplifying
5x + 13 + -3x2 + 6x + -8 = 0

Reorder the terms:
13 + -8 + 5x + 6x + -3x2 = 0

Combine like terms: 13 + -8 = 5
5 + 5x + 6x + -3x2 = 0

Combine like terms: 5x + 6x = 11x
5 + 11x + -3x2 = 0

Solving
5 + 11x + -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'.
-1.666666667 + -3.666666667x + x2 = 0

Move the constant term to the right:

Add '1.666666667' to each side of the equation.
-1.666666667 + -3.666666667x + 1.666666667 + x2 = 0 + 1.666666667

Reorder the terms:
-1.666666667 + 1.666666667 + -3.666666667x + x2 = 0 + 1.666666667

Combine like terms: -1.666666667 + 1.666666667 = 0.000000000
0.000000000 + -3.666666667x + x2 = 0 + 1.666666667
-3.666666667x + x2 = 0 + 1.666666667

Combine like terms: 0 + 1.666666667 = 1.666666667
-3.666666667x + x2 = 1.666666667

The x term is -3.666666667x.  Take half its coefficient (-1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
-3.666666667x + 3.361111114 + x2 = 1.666666667 + 3.361111114

Reorder the terms:
3.361111114 + -3.666666667x + x2 = 1.666666667 + 3.361111114

Combine like terms: 1.666666667 + 3.361111114 = 5.027777781
3.361111114 + -3.666666667x + x2 = 5.027777781

Factor a perfect square on the left side:
(x + -1.833333334)(x + -1.833333334) = 5.027777781

Calculate the square root of the right side: 2.242270675

Break this problem into two subproblems by setting 
(x + -1.833333334) equal to 2.242270675 and -2.242270675.

Subproblem 1

x + -1.833333334 = 2.242270675 Simplifying x + -1.833333334 = 2.242270675 Reorder the terms: -1.833333334 + x = 2.242270675 Solving -1.833333334 + x = 2.242270675 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = 2.242270675 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = 2.242270675 + 1.833333334 x = 2.242270675 + 1.833333334 Combine like terms: 2.242270675 + 1.833333334 = 4.075604009 x = 4.075604009 Simplifying x = 4.075604009

Subproblem 2

x + -1.833333334 = -2.242270675 Simplifying x + -1.833333334 = -2.242270675 Reorder the terms: -1.833333334 + x = -2.242270675 Solving -1.833333334 + x = -2.242270675 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = -2.242270675 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = -2.242270675 + 1.833333334 x = -2.242270675 + 1.833333334 Combine like terms: -2.242270675 + 1.833333334 = -0.408937341 x = -0.408937341 Simplifying x = -0.408937341

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.075604009, -0.408937341}

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