8=x^2-16x-16

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Solution for 8=x^2-16x-16 equation:


Simplifying
8 = x2 + -16x + -16

Reorder the terms:
8 = -16 + -16x + x2

Solving
8 = -16 + -16x + x2

Solving for variable 'x'.

Combine like terms: 8 + 16 = 24
24 + 16x + -1x2 = -16 + -16x + x2 + 16 + 16x + -1x2

Reorder the terms:
24 + 16x + -1x2 = -16 + 16 + -16x + 16x + x2 + -1x2

Combine like terms: -16 + 16 = 0
24 + 16x + -1x2 = 0 + -16x + 16x + x2 + -1x2
24 + 16x + -1x2 = -16x + 16x + x2 + -1x2

Combine like terms: -16x + 16x = 0
24 + 16x + -1x2 = 0 + x2 + -1x2
24 + 16x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
24 + 16x + -1x2 = 0

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

Divide each side by '-1'.
-24 + -16x + x2 = 0

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + -16x + 24 + x2 = 0 + 24

Reorder the terms:
-24 + 24 + -16x + x2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + -16x + x2 = 0 + 24
-16x + x2 = 0 + 24

Combine like terms: 0 + 24 = 24
-16x + x2 = 24

The x term is -16x.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x + 64 + x2 = 24 + 64

Reorder the terms:
64 + -16x + x2 = 24 + 64

Combine like terms: 24 + 64 = 88
64 + -16x + x2 = 88

Factor a perfect square on the left side:
(x + -8)(x + -8) = 88

Calculate the square root of the right side: 9.38083152

Break this problem into two subproblems by setting 
(x + -8) equal to 9.38083152 and -9.38083152.

Subproblem 1

x + -8 = 9.38083152 Simplifying x + -8 = 9.38083152 Reorder the terms: -8 + x = 9.38083152 Solving -8 + x = 9.38083152 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = 9.38083152 + 8 Combine like terms: -8 + 8 = 0 0 + x = 9.38083152 + 8 x = 9.38083152 + 8 Combine like terms: 9.38083152 + 8 = 17.38083152 x = 17.38083152 Simplifying x = 17.38083152

Subproblem 2

x + -8 = -9.38083152 Simplifying x + -8 = -9.38083152 Reorder the terms: -8 + x = -9.38083152 Solving -8 + x = -9.38083152 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = -9.38083152 + 8 Combine like terms: -8 + 8 = 0 0 + x = -9.38083152 + 8 x = -9.38083152 + 8 Combine like terms: -9.38083152 + 8 = -1.38083152 x = -1.38083152 Simplifying x = -1.38083152

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.38083152, -1.38083152}

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