x^2-6x-16=16

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Solution for x^2-6x-16=16 equation:


Simplifying
x2 + -6x + -16 = 16

Reorder the terms:
-16 + -6x + x2 = 16

Solving
-16 + -6x + x2 = 16

Solving for variable 'x'.

Reorder the terms:
-16 + -16 + -6x + x2 = 16 + -16

Combine like terms: -16 + -16 = -32
-32 + -6x + x2 = 16 + -16

Combine like terms: 16 + -16 = 0
-32 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + -6x + 32 + x2 = 0 + 32

Reorder the terms:
-32 + 32 + -6x + x2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + -6x + x2 = 0 + 32
-6x + x2 = 0 + 32

Combine like terms: 0 + 32 = 32
-6x + x2 = 32

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 32 + 9

Reorder the terms:
9 + -6x + x2 = 32 + 9

Combine like terms: 32 + 9 = 41
9 + -6x + x2 = 41

Factor a perfect square on the left side:
(x + -3)(x + -3) = 41

Calculate the square root of the right side: 6.403124237

Break this problem into two subproblems by setting 
(x + -3) equal to 6.403124237 and -6.403124237.

Subproblem 1

x + -3 = 6.403124237 Simplifying x + -3 = 6.403124237 Reorder the terms: -3 + x = 6.403124237 Solving -3 + x = 6.403124237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 6.403124237 + 3 Combine like terms: -3 + 3 = 0 0 + x = 6.403124237 + 3 x = 6.403124237 + 3 Combine like terms: 6.403124237 + 3 = 9.403124237 x = 9.403124237 Simplifying x = 9.403124237

Subproblem 2

x + -3 = -6.403124237 Simplifying x + -3 = -6.403124237 Reorder the terms: -3 + x = -6.403124237 Solving -3 + x = -6.403124237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -6.403124237 + 3 Combine like terms: -3 + 3 = 0 0 + x = -6.403124237 + 3 x = -6.403124237 + 3 Combine like terms: -6.403124237 + 3 = -3.403124237 x = -3.403124237 Simplifying x = -3.403124237

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.403124237, -3.403124237}

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