5x^2-32x-104=0

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Solution for 5x^2-32x-104=0 equation:


Simplifying
5x2 + -32x + -104 = 0

Reorder the terms:
-104 + -32x + 5x2 = 0

Solving
-104 + -32x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-20.8 + -6.4x + x2 = 0

Move the constant term to the right:

Add '20.8' to each side of the equation.
-20.8 + -6.4x + 20.8 + x2 = 0 + 20.8

Reorder the terms:
-20.8 + 20.8 + -6.4x + x2 = 0 + 20.8

Combine like terms: -20.8 + 20.8 = 0.0
0.0 + -6.4x + x2 = 0 + 20.8
-6.4x + x2 = 0 + 20.8

Combine like terms: 0 + 20.8 = 20.8
-6.4x + x2 = 20.8

The x term is -6.4x.  Take half its coefficient (-3.2).
Square it (10.24) and add it to both sides.

Add '10.24' to each side of the equation.
-6.4x + 10.24 + x2 = 20.8 + 10.24

Reorder the terms:
10.24 + -6.4x + x2 = 20.8 + 10.24

Combine like terms: 20.8 + 10.24 = 31.04
10.24 + -6.4x + x2 = 31.04

Factor a perfect square on the left side:
(x + -3.2)(x + -3.2) = 31.04

Calculate the square root of the right side: 5.571355311

Break this problem into two subproblems by setting 
(x + -3.2) equal to 5.571355311 and -5.571355311.

Subproblem 1

x + -3.2 = 5.571355311 Simplifying x + -3.2 = 5.571355311 Reorder the terms: -3.2 + x = 5.571355311 Solving -3.2 + x = 5.571355311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.2' to each side of the equation. -3.2 + 3.2 + x = 5.571355311 + 3.2 Combine like terms: -3.2 + 3.2 = 0.0 0.0 + x = 5.571355311 + 3.2 x = 5.571355311 + 3.2 Combine like terms: 5.571355311 + 3.2 = 8.771355311 x = 8.771355311 Simplifying x = 8.771355311

Subproblem 2

x + -3.2 = -5.571355311 Simplifying x + -3.2 = -5.571355311 Reorder the terms: -3.2 + x = -5.571355311 Solving -3.2 + x = -5.571355311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.2' to each side of the equation. -3.2 + 3.2 + x = -5.571355311 + 3.2 Combine like terms: -3.2 + 3.2 = 0.0 0.0 + x = -5.571355311 + 3.2 x = -5.571355311 + 3.2 Combine like terms: -5.571355311 + 3.2 = -2.371355311 x = -2.371355311 Simplifying x = -2.371355311

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.771355311, -2.371355311}

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