5x^2-5x-56=0

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Solution for 5x^2-5x-56=0 equation:


Simplifying
5x2 + -5x + -56 = 0

Reorder the terms:
-56 + -5x + 5x2 = 0

Solving
-56 + -5x + 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'.
-11.2 + -1x + x2 = 0

Move the constant term to the right:

Add '11.2' to each side of the equation.
-11.2 + -1x + 11.2 + x2 = 0 + 11.2

Reorder the terms:
-11.2 + 11.2 + -1x + x2 = 0 + 11.2

Combine like terms: -11.2 + 11.2 = 0.0
0.0 + -1x + x2 = 0 + 11.2
-1x + x2 = 0 + 11.2

Combine like terms: 0 + 11.2 = 11.2
-1x + x2 = 11.2

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 11.2 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 11.2 + 0.25

Combine like terms: 11.2 + 0.25 = 11.45
0.25 + -1x + x2 = 11.45

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 11.45

Calculate the square root of the right side: 3.383784863

Break this problem into two subproblems by setting 
(x + -0.5) equal to 3.383784863 and -3.383784863.

Subproblem 1

x + -0.5 = 3.383784863 Simplifying x + -0.5 = 3.383784863 Reorder the terms: -0.5 + x = 3.383784863 Solving -0.5 + x = 3.383784863 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 3.383784863 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 3.383784863 + 0.5 x = 3.383784863 + 0.5 Combine like terms: 3.383784863 + 0.5 = 3.883784863 x = 3.883784863 Simplifying x = 3.883784863

Subproblem 2

x + -0.5 = -3.383784863 Simplifying x + -0.5 = -3.383784863 Reorder the terms: -0.5 + x = -3.383784863 Solving -0.5 + x = -3.383784863 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -3.383784863 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -3.383784863 + 0.5 x = -3.383784863 + 0.5 Combine like terms: -3.383784863 + 0.5 = -2.883784863 x = -2.883784863 Simplifying x = -2.883784863

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.883784863, -2.883784863}

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