x^2-8x-112=0

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Solution for x^2-8x-112=0 equation:


Simplifying
x2 + -8x + -112 = 0

Reorder the terms:
-112 + -8x + x2 = 0

Solving
-112 + -8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '112' to each side of the equation.
-112 + -8x + 112 + x2 = 0 + 112

Reorder the terms:
-112 + 112 + -8x + x2 = 0 + 112

Combine like terms: -112 + 112 = 0
0 + -8x + x2 = 0 + 112
-8x + x2 = 0 + 112

Combine like terms: 0 + 112 = 112
-8x + x2 = 112

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 112 + 16

Reorder the terms:
16 + -8x + x2 = 112 + 16

Combine like terms: 112 + 16 = 128
16 + -8x + x2 = 128

Factor a perfect square on the left side:
(x + -4)(x + -4) = 128

Calculate the square root of the right side: 11.313708499

Break this problem into two subproblems by setting 
(x + -4) equal to 11.313708499 and -11.313708499.

Subproblem 1

x + -4 = 11.313708499 Simplifying x + -4 = 11.313708499 Reorder the terms: -4 + x = 11.313708499 Solving -4 + x = 11.313708499 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 11.313708499 + 4 Combine like terms: -4 + 4 = 0 0 + x = 11.313708499 + 4 x = 11.313708499 + 4 Combine like terms: 11.313708499 + 4 = 15.313708499 x = 15.313708499 Simplifying x = 15.313708499

Subproblem 2

x + -4 = -11.313708499 Simplifying x + -4 = -11.313708499 Reorder the terms: -4 + x = -11.313708499 Solving -4 + x = -11.313708499 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -11.313708499 + 4 Combine like terms: -4 + 4 = 0 0 + x = -11.313708499 + 4 x = -11.313708499 + 4 Combine like terms: -11.313708499 + 4 = -7.313708499 x = -7.313708499 Simplifying x = -7.313708499

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.313708499, -7.313708499}

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