6x^2+25x-168=0

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Solution for 6x^2+25x-168=0 equation:


Simplifying
6x2 + 25x + -168 = 0

Reorder the terms:
-168 + 25x + 6x2 = 0

Solving
-168 + 25x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-28 + 4.166666667x + x2 = 0

Move the constant term to the right:

Add '28' to each side of the equation.
-28 + 4.166666667x + 28 + x2 = 0 + 28

Reorder the terms:
-28 + 28 + 4.166666667x + x2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + 4.166666667x + x2 = 0 + 28
4.166666667x + x2 = 0 + 28

Combine like terms: 0 + 28 = 28
4.166666667x + x2 = 28

The x term is 4.166666667x.  Take half its coefficient (2.083333334).
Square it (4.340277781) and add it to both sides.

Add '4.340277781' to each side of the equation.
4.166666667x + 4.340277781 + x2 = 28 + 4.340277781

Reorder the terms:
4.340277781 + 4.166666667x + x2 = 28 + 4.340277781

Combine like terms: 28 + 4.340277781 = 32.340277781
4.340277781 + 4.166666667x + x2 = 32.340277781

Factor a perfect square on the left side:
(x + 2.083333334)(x + 2.083333334) = 32.340277781

Calculate the square root of the right side: 5.686851306

Break this problem into two subproblems by setting 
(x + 2.083333334) equal to 5.686851306 and -5.686851306.

Subproblem 1

x + 2.083333334 = 5.686851306 Simplifying x + 2.083333334 = 5.686851306 Reorder the terms: 2.083333334 + x = 5.686851306 Solving 2.083333334 + x = 5.686851306 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.083333334' to each side of the equation. 2.083333334 + -2.083333334 + x = 5.686851306 + -2.083333334 Combine like terms: 2.083333334 + -2.083333334 = 0.000000000 0.000000000 + x = 5.686851306 + -2.083333334 x = 5.686851306 + -2.083333334 Combine like terms: 5.686851306 + -2.083333334 = 3.603517972 x = 3.603517972 Simplifying x = 3.603517972

Subproblem 2

x + 2.083333334 = -5.686851306 Simplifying x + 2.083333334 = -5.686851306 Reorder the terms: 2.083333334 + x = -5.686851306 Solving 2.083333334 + x = -5.686851306 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.083333334' to each side of the equation. 2.083333334 + -2.083333334 + x = -5.686851306 + -2.083333334 Combine like terms: 2.083333334 + -2.083333334 = 0.000000000 0.000000000 + x = -5.686851306 + -2.083333334 x = -5.686851306 + -2.083333334 Combine like terms: -5.686851306 + -2.083333334 = -7.77018464 x = -7.77018464 Simplifying x = -7.77018464

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.603517972, -7.77018464}

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