x*x+16x-6=0

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Solution for x*x+16x-6=0 equation:


Simplifying
x * x + 16x + -6 = 0

Multiply x * x
x2 + 16x + -6 = 0

Reorder the terms:
-6 + 16x + x2 = 0

Solving
-6 + 16x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 16x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + 16x + x2 = 0 + 6

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

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

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 = 6 + 64

Reorder the terms:
64 + 16x + x2 = 6 + 64

Combine like terms: 6 + 64 = 70
64 + 16x + x2 = 70

Factor a perfect square on the left side:
(x + 8)(x + 8) = 70

Calculate the square root of the right side: 8.366600265

Break this problem into two subproblems by setting 
(x + 8) equal to 8.366600265 and -8.366600265.

Subproblem 1

x + 8 = 8.366600265 Simplifying x + 8 = 8.366600265 Reorder the terms: 8 + x = 8.366600265 Solving 8 + x = 8.366600265 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 = 8.366600265 + -8 Combine like terms: 8 + -8 = 0 0 + x = 8.366600265 + -8 x = 8.366600265 + -8 Combine like terms: 8.366600265 + -8 = 0.366600265 x = 0.366600265 Simplifying x = 0.366600265

Subproblem 2

x + 8 = -8.366600265 Simplifying x + 8 = -8.366600265 Reorder the terms: 8 + x = -8.366600265 Solving 8 + x = -8.366600265 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 = -8.366600265 + -8 Combine like terms: 8 + -8 = 0 0 + x = -8.366600265 + -8 x = -8.366600265 + -8 Combine like terms: -8.366600265 + -8 = -16.366600265 x = -16.366600265 Simplifying x = -16.366600265

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.366600265, -16.366600265}

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