20x^2-32x-565=0

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Solution for 20x^2-32x-565=0 equation:


Simplifying
20x2 + -32x + -565 = 0

Reorder the terms:
-565 + -32x + 20x2 = 0

Solving
-565 + -32x + 20x2 = 0

Solving for variable 'x'.

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

Divide each side by '20'.
-28.25 + -1.6x + x2 = 0

Move the constant term to the right:

Add '28.25' to each side of the equation.
-28.25 + -1.6x + 28.25 + x2 = 0 + 28.25

Reorder the terms:
-28.25 + 28.25 + -1.6x + x2 = 0 + 28.25

Combine like terms: -28.25 + 28.25 = 0.00
0.00 + -1.6x + x2 = 0 + 28.25
-1.6x + x2 = 0 + 28.25

Combine like terms: 0 + 28.25 = 28.25
-1.6x + x2 = 28.25

The x term is -1.6x.  Take half its coefficient (-0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
-1.6x + 0.64 + x2 = 28.25 + 0.64

Reorder the terms:
0.64 + -1.6x + x2 = 28.25 + 0.64

Combine like terms: 28.25 + 0.64 = 28.89
0.64 + -1.6x + x2 = 28.89

Factor a perfect square on the left side:
(x + -0.8)(x + -0.8) = 28.89

Calculate the square root of the right side: 5.37494186

Break this problem into two subproblems by setting 
(x + -0.8) equal to 5.37494186 and -5.37494186.

Subproblem 1

x + -0.8 = 5.37494186 Simplifying x + -0.8 = 5.37494186 Reorder the terms: -0.8 + x = 5.37494186 Solving -0.8 + x = 5.37494186 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = 5.37494186 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = 5.37494186 + 0.8 x = 5.37494186 + 0.8 Combine like terms: 5.37494186 + 0.8 = 6.17494186 x = 6.17494186 Simplifying x = 6.17494186

Subproblem 2

x + -0.8 = -5.37494186 Simplifying x + -0.8 = -5.37494186 Reorder the terms: -0.8 + x = -5.37494186 Solving -0.8 + x = -5.37494186 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = -5.37494186 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = -5.37494186 + 0.8 x = -5.37494186 + 0.8 Combine like terms: -5.37494186 + 0.8 = -4.57494186 x = -4.57494186 Simplifying x = -4.57494186

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.17494186, -4.57494186}

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