x^2-16x-34=9

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Solution for x^2-16x-34=9 equation:


Simplifying
x2 + -16x + -34 = 9

Reorder the terms:
-34 + -16x + x2 = 9

Solving
-34 + -16x + x2 = 9

Solving for variable 'x'.

Reorder the terms:
-34 + -9 + -16x + x2 = 9 + -9

Combine like terms: -34 + -9 = -43
-43 + -16x + x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-43 + -16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '43' to each side of the equation.
-43 + -16x + 43 + x2 = 0 + 43

Reorder the terms:
-43 + 43 + -16x + x2 = 0 + 43

Combine like terms: -43 + 43 = 0
0 + -16x + x2 = 0 + 43
-16x + x2 = 0 + 43

Combine like terms: 0 + 43 = 43
-16x + x2 = 43

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 = 43 + 64

Reorder the terms:
64 + -16x + x2 = 43 + 64

Combine like terms: 43 + 64 = 107
64 + -16x + x2 = 107

Factor a perfect square on the left side:
(x + -8)(x + -8) = 107

Calculate the square root of the right side: 10.344080433

Break this problem into two subproblems by setting 
(x + -8) equal to 10.344080433 and -10.344080433.

Subproblem 1

x + -8 = 10.344080433 Simplifying x + -8 = 10.344080433 Reorder the terms: -8 + x = 10.344080433 Solving -8 + x = 10.344080433 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 = 10.344080433 + 8 Combine like terms: -8 + 8 = 0 0 + x = 10.344080433 + 8 x = 10.344080433 + 8 Combine like terms: 10.344080433 + 8 = 18.344080433 x = 18.344080433 Simplifying x = 18.344080433

Subproblem 2

x + -8 = -10.344080433 Simplifying x + -8 = -10.344080433 Reorder the terms: -8 + x = -10.344080433 Solving -8 + x = -10.344080433 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 = -10.344080433 + 8 Combine like terms: -8 + 8 = 0 0 + x = -10.344080433 + 8 x = -10.344080433 + 8 Combine like terms: -10.344080433 + 8 = -2.344080433 x = -2.344080433 Simplifying x = -2.344080433

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.344080433, -2.344080433}

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