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

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


Simplifying
x = x2 + -6(x + 8) + 5

Reorder the terms:
x = x2 + -6(8 + x) + 5
x = x2 + (8 * -6 + x * -6) + 5
x = x2 + (-48 + -6x) + 5

Reorder the terms:
x = -48 + 5 + -6x + x2

Combine like terms: -48 + 5 = -43
x = -43 + -6x + x2

Solving
x = -43 + -6x + x2

Solving for variable 'x'.

Reorder the terms:
43 + x + 6x + -1x2 = -43 + -6x + x2 + 43 + 6x + -1x2

Combine like terms: x + 6x = 7x
43 + 7x + -1x2 = -43 + -6x + x2 + 43 + 6x + -1x2

Reorder the terms:
43 + 7x + -1x2 = -43 + 43 + -6x + 6x + x2 + -1x2

Combine like terms: -43 + 43 = 0
43 + 7x + -1x2 = 0 + -6x + 6x + x2 + -1x2
43 + 7x + -1x2 = -6x + 6x + x2 + -1x2

Combine like terms: -6x + 6x = 0
43 + 7x + -1x2 = 0 + x2 + -1x2
43 + 7x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
43 + 7x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-43 + -7x + x2 = 0

Move the constant term to the right:

Add '43' to each side of the equation.
-43 + -7x + 43 + x2 = 0 + 43

Reorder the terms:
-43 + 43 + -7x + x2 = 0 + 43

Combine like terms: -43 + 43 = 0
0 + -7x + x2 = 0 + 43
-7x + x2 = 0 + 43

Combine like terms: 0 + 43 = 43
-7x + x2 = 43

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = 43 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 43 + 12.25

Combine like terms: 43 + 12.25 = 55.25
12.25 + -7x + x2 = 55.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 55.25

Calculate the square root of the right side: 7.433034374

Break this problem into two subproblems by setting 
(x + -3.5) equal to 7.433034374 and -7.433034374.

Subproblem 1

x + -3.5 = 7.433034374 Simplifying x + -3.5 = 7.433034374 Reorder the terms: -3.5 + x = 7.433034374 Solving -3.5 + x = 7.433034374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 7.433034374 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 7.433034374 + 3.5 x = 7.433034374 + 3.5 Combine like terms: 7.433034374 + 3.5 = 10.933034374 x = 10.933034374 Simplifying x = 10.933034374

Subproblem 2

x + -3.5 = -7.433034374 Simplifying x + -3.5 = -7.433034374 Reorder the terms: -3.5 + x = -7.433034374 Solving -3.5 + x = -7.433034374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -7.433034374 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -7.433034374 + 3.5 x = -7.433034374 + 3.5 Combine like terms: -7.433034374 + 3.5 = -3.933034374 x = -3.933034374 Simplifying x = -3.933034374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.933034374, -3.933034374}

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