-6x(x-4)+9=x(x-4)

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Solution for -6x(x-4)+9=x(x-4) equation:


Simplifying
-6x(x + -4) + 9 = x(x + -4)

Reorder the terms:
-6x(-4 + x) + 9 = x(x + -4)
(-4 * -6x + x * -6x) + 9 = x(x + -4)
(24x + -6x2) + 9 = x(x + -4)

Reorder the terms:
9 + 24x + -6x2 = x(x + -4)

Reorder the terms:
9 + 24x + -6x2 = x(-4 + x)
9 + 24x + -6x2 = (-4 * x + x * x)
9 + 24x + -6x2 = (-4x + x2)

Solving
9 + 24x + -6x2 = -4x + x2

Solving for variable 'x'.

Reorder the terms:
9 + 24x + 4x + -6x2 + -1x2 = -4x + x2 + 4x + -1x2

Combine like terms: 24x + 4x = 28x
9 + 28x + -6x2 + -1x2 = -4x + x2 + 4x + -1x2

Combine like terms: -6x2 + -1x2 = -7x2
9 + 28x + -7x2 = -4x + x2 + 4x + -1x2

Reorder the terms:
9 + 28x + -7x2 = -4x + 4x + x2 + -1x2

Combine like terms: -4x + 4x = 0
9 + 28x + -7x2 = 0 + x2 + -1x2
9 + 28x + -7x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
9 + 28x + -7x2 = 0

Begin completing the square.  Divide all terms by
-7 the coefficient of the squared term: 

Divide each side by '-7'.
-1.285714286 + -4x + x2 = 0

Move the constant term to the right:

Add '1.285714286' to each side of the equation.
-1.285714286 + -4x + 1.285714286 + x2 = 0 + 1.285714286

Reorder the terms:
-1.285714286 + 1.285714286 + -4x + x2 = 0 + 1.285714286

Combine like terms: -1.285714286 + 1.285714286 = 0.000000000
0.000000000 + -4x + x2 = 0 + 1.285714286
-4x + x2 = 0 + 1.285714286

Combine like terms: 0 + 1.285714286 = 1.285714286
-4x + x2 = 1.285714286

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 1.285714286 + 4

Reorder the terms:
4 + -4x + x2 = 1.285714286 + 4

Combine like terms: 1.285714286 + 4 = 5.285714286
4 + -4x + x2 = 5.285714286

Factor a perfect square on the left side:
(x + -2)(x + -2) = 5.285714286

Calculate the square root of the right side: 2.299068134

Break this problem into two subproblems by setting 
(x + -2) equal to 2.299068134 and -2.299068134.

Subproblem 1

x + -2 = 2.299068134 Simplifying x + -2 = 2.299068134 Reorder the terms: -2 + x = 2.299068134 Solving -2 + x = 2.299068134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 2.299068134 + 2 Combine like terms: -2 + 2 = 0 0 + x = 2.299068134 + 2 x = 2.299068134 + 2 Combine like terms: 2.299068134 + 2 = 4.299068134 x = 4.299068134 Simplifying x = 4.299068134

Subproblem 2

x + -2 = -2.299068134 Simplifying x + -2 = -2.299068134 Reorder the terms: -2 + x = -2.299068134 Solving -2 + x = -2.299068134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -2.299068134 + 2 Combine like terms: -2 + 2 = 0 0 + x = -2.299068134 + 2 x = -2.299068134 + 2 Combine like terms: -2.299068134 + 2 = -0.299068134 x = -0.299068134 Simplifying x = -0.299068134

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.299068134, -0.299068134}

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