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

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


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

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

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

Multiply (-4 + x) * (6 + x)
(-4(6 + x) + x(6 + x)) = x
((6 * -4 + x * -4) + x(6 + x)) = x
((-24 + -4x) + x(6 + x)) = x
(-24 + -4x + (6 * x + x * x)) = x
(-24 + -4x + (6x + x2)) = x

Combine like terms: -4x + 6x = 2x
(-24 + 2x + x2) = x

Solving
-24 + 2x + x2 = x

Solving for variable 'x'.

Reorder the terms:
-24 + 2x + -1x + x2 = x + -1x

Combine like terms: 2x + -1x = 1x
-24 + 1x + x2 = x + -1x

Combine like terms: x + -1x = 0
-24 + 1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + 1x + 24 + x2 = 0 + 24

Reorder the terms:
-24 + 24 + 1x + x2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + 1x + x2 = 0 + 24
1x + x2 = 0 + 24

Combine like terms: 0 + 24 = 24
1x + x2 = 24

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.
x + 0.25 + x2 = 24 + 0.25

Reorder the terms:
0.25 + x + x2 = 24 + 0.25

Combine like terms: 24 + 0.25 = 24.25
0.25 + x + x2 = 24.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 24.25

Calculate the square root of the right side: 4.924428901

Break this problem into two subproblems by setting 
(x + 0.5) equal to 4.924428901 and -4.924428901.

Subproblem 1

x + 0.5 = 4.924428901 Simplifying x + 0.5 = 4.924428901 Reorder the terms: 0.5 + x = 4.924428901 Solving 0.5 + x = 4.924428901 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 = 4.924428901 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 4.924428901 + -0.5 x = 4.924428901 + -0.5 Combine like terms: 4.924428901 + -0.5 = 4.424428901 x = 4.424428901 Simplifying x = 4.424428901

Subproblem 2

x + 0.5 = -4.924428901 Simplifying x + 0.5 = -4.924428901 Reorder the terms: 0.5 + x = -4.924428901 Solving 0.5 + x = -4.924428901 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 = -4.924428901 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -4.924428901 + -0.5 x = -4.924428901 + -0.5 Combine like terms: -4.924428901 + -0.5 = -5.424428901 x = -5.424428901 Simplifying x = -5.424428901

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.424428901, -5.424428901}

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