4x^2-53x-9=0

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Solution for 4x^2-53x-9=0 equation:


Simplifying
4x2 + -53x + -9 = 0

Reorder the terms:
-9 + -53x + 4x2 = 0

Solving
-9 + -53x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-2.25 + -13.25x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + -13.25x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + -13.25x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + -13.25x + x2 = 0 + 2.25
-13.25x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
-13.25x + x2 = 2.25

The x term is -13.25x.  Take half its coefficient (-6.625).
Square it (43.890625) and add it to both sides.

Add '43.890625' to each side of the equation.
-13.25x + 43.890625 + x2 = 2.25 + 43.890625

Reorder the terms:
43.890625 + -13.25x + x2 = 2.25 + 43.890625

Combine like terms: 2.25 + 43.890625 = 46.140625
43.890625 + -13.25x + x2 = 46.140625

Factor a perfect square on the left side:
(x + -6.625)(x + -6.625) = 46.140625

Calculate the square root of the right side: 6.792689085

Break this problem into two subproblems by setting 
(x + -6.625) equal to 6.792689085 and -6.792689085.

Subproblem 1

x + -6.625 = 6.792689085 Simplifying x + -6.625 = 6.792689085 Reorder the terms: -6.625 + x = 6.792689085 Solving -6.625 + x = 6.792689085 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.625' to each side of the equation. -6.625 + 6.625 + x = 6.792689085 + 6.625 Combine like terms: -6.625 + 6.625 = 0.000 0.000 + x = 6.792689085 + 6.625 x = 6.792689085 + 6.625 Combine like terms: 6.792689085 + 6.625 = 13.417689085 x = 13.417689085 Simplifying x = 13.417689085

Subproblem 2

x + -6.625 = -6.792689085 Simplifying x + -6.625 = -6.792689085 Reorder the terms: -6.625 + x = -6.792689085 Solving -6.625 + x = -6.792689085 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.625' to each side of the equation. -6.625 + 6.625 + x = -6.792689085 + 6.625 Combine like terms: -6.625 + 6.625 = 0.000 0.000 + x = -6.792689085 + 6.625 x = -6.792689085 + 6.625 Combine like terms: -6.792689085 + 6.625 = -0.167689085 x = -0.167689085 Simplifying x = -0.167689085

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.417689085, -0.167689085}

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