-6x(x+4)-x^2+8-5x=

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Solution for -6x(x+4)-x^2+8-5x= equation:


Simplifying
-6x(x + 4) + -1x2 + 8 + -5x = 0

Reorder the terms:
-6x(4 + x) + -1x2 + 8 + -5x = 0
(4 * -6x + x * -6x) + -1x2 + 8 + -5x = 0
(-24x + -6x2) + -1x2 + 8 + -5x = 0

Reorder the terms:
8 + -24x + -5x + -6x2 + -1x2 = 0

Combine like terms: -24x + -5x = -29x
8 + -29x + -6x2 + -1x2 = 0

Combine like terms: -6x2 + -1x2 = -7x2
8 + -29x + -7x2 = 0

Solving
8 + -29x + -7x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-7 the coefficient of the squared term: 

Divide each side by '-7'.
-1.142857143 + 4.142857143x + x2 = 0

Move the constant term to the right:

Add '1.142857143' to each side of the equation.
-1.142857143 + 4.142857143x + 1.142857143 + x2 = 0 + 1.142857143

Reorder the terms:
-1.142857143 + 1.142857143 + 4.142857143x + x2 = 0 + 1.142857143

Combine like terms: -1.142857143 + 1.142857143 = 0.000000000
0.000000000 + 4.142857143x + x2 = 0 + 1.142857143
4.142857143x + x2 = 0 + 1.142857143

Combine like terms: 0 + 1.142857143 = 1.142857143
4.142857143x + x2 = 1.142857143

The x term is 4.142857143x.  Take half its coefficient (2.071428572).
Square it (4.290816329) and add it to both sides.

Add '4.290816329' to each side of the equation.
4.142857143x + 4.290816329 + x2 = 1.142857143 + 4.290816329

Reorder the terms:
4.290816329 + 4.142857143x + x2 = 1.142857143 + 4.290816329

Combine like terms: 1.142857143 + 4.290816329 = 5.433673472
4.290816329 + 4.142857143x + x2 = 5.433673472

Factor a perfect square on the left side:
(x + 2.071428572)(x + 2.071428572) = 5.433673472

Calculate the square root of the right side: 2.331024125

Break this problem into two subproblems by setting 
(x + 2.071428572) equal to 2.331024125 and -2.331024125.

Subproblem 1

x + 2.071428572 = 2.331024125 Simplifying x + 2.071428572 = 2.331024125 Reorder the terms: 2.071428572 + x = 2.331024125 Solving 2.071428572 + x = 2.331024125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.071428572' to each side of the equation. 2.071428572 + -2.071428572 + x = 2.331024125 + -2.071428572 Combine like terms: 2.071428572 + -2.071428572 = 0.000000000 0.000000000 + x = 2.331024125 + -2.071428572 x = 2.331024125 + -2.071428572 Combine like terms: 2.331024125 + -2.071428572 = 0.259595553 x = 0.259595553 Simplifying x = 0.259595553

Subproblem 2

x + 2.071428572 = -2.331024125 Simplifying x + 2.071428572 = -2.331024125 Reorder the terms: 2.071428572 + x = -2.331024125 Solving 2.071428572 + x = -2.331024125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.071428572' to each side of the equation. 2.071428572 + -2.071428572 + x = -2.331024125 + -2.071428572 Combine like terms: 2.071428572 + -2.071428572 = 0.000000000 0.000000000 + x = -2.331024125 + -2.071428572 x = -2.331024125 + -2.071428572 Combine like terms: -2.331024125 + -2.071428572 = -4.402452697 x = -4.402452697 Simplifying x = -4.402452697

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.259595553, -4.402452697}

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