4x^2-32x-9=0

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Solution for 4x^2-32x-9=0 equation:


Simplifying
4x2 + -32x + -9 = 0

Reorder the terms:
-9 + -32x + 4x2 = 0

Solving
-9 + -32x + 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 + -8x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + -8x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + -8x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + -8x + x2 = 0 + 2.25
-8x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
-8x + x2 = 2.25

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 = 2.25 + 16

Reorder the terms:
16 + -8x + x2 = 2.25 + 16

Combine like terms: 2.25 + 16 = 18.25
16 + -8x + x2 = 18.25

Factor a perfect square on the left side:
(x + -4)(x + -4) = 18.25

Calculate the square root of the right side: 4.272001873

Break this problem into two subproblems by setting 
(x + -4) equal to 4.272001873 and -4.272001873.

Subproblem 1

x + -4 = 4.272001873 Simplifying x + -4 = 4.272001873 Reorder the terms: -4 + x = 4.272001873 Solving -4 + x = 4.272001873 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 = 4.272001873 + 4 Combine like terms: -4 + 4 = 0 0 + x = 4.272001873 + 4 x = 4.272001873 + 4 Combine like terms: 4.272001873 + 4 = 8.272001873 x = 8.272001873 Simplifying x = 8.272001873

Subproblem 2

x + -4 = -4.272001873 Simplifying x + -4 = -4.272001873 Reorder the terms: -4 + x = -4.272001873 Solving -4 + x = -4.272001873 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 = -4.272001873 + 4 Combine like terms: -4 + 4 = 0 0 + x = -4.272001873 + 4 x = -4.272001873 + 4 Combine like terms: -4.272001873 + 4 = -0.272001873 x = -0.272001873 Simplifying x = -0.272001873

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.272001873, -0.272001873}

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