(x-4)(x+2)=24

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Solution for (x-4)(x+2)=24 equation:


Simplifying
(x + -4)(x + 2) = 24

Reorder the terms:
(-4 + x)(x + 2) = 24

Reorder the terms:
(-4 + x)(2 + x) = 24

Multiply (-4 + x) * (2 + x)
(-4(2 + x) + x(2 + x)) = 24
((2 * -4 + x * -4) + x(2 + x)) = 24
((-8 + -4x) + x(2 + x)) = 24
(-8 + -4x + (2 * x + x * x)) = 24
(-8 + -4x + (2x + x2)) = 24

Combine like terms: -4x + 2x = -2x
(-8 + -2x + x2) = 24

Solving
-8 + -2x + x2 = 24

Solving for variable 'x'.

Reorder the terms:
-8 + -24 + -2x + x2 = 24 + -24

Combine like terms: -8 + -24 = -32
-32 + -2x + x2 = 24 + -24

Combine like terms: 24 + -24 = 0
-32 + -2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + -2x + 32 + x2 = 0 + 32

Reorder the terms:
-32 + 32 + -2x + x2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + -2x + x2 = 0 + 32
-2x + x2 = 0 + 32

Combine like terms: 0 + 32 = 32
-2x + x2 = 32

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 32 + 1

Reorder the terms:
1 + -2x + x2 = 32 + 1

Combine like terms: 32 + 1 = 33
1 + -2x + x2 = 33

Factor a perfect square on the left side:
(x + -1)(x + -1) = 33

Calculate the square root of the right side: 5.744562647

Break this problem into two subproblems by setting 
(x + -1) equal to 5.744562647 and -5.744562647.

Subproblem 1

x + -1 = 5.744562647 Simplifying x + -1 = 5.744562647 Reorder the terms: -1 + x = 5.744562647 Solving -1 + x = 5.744562647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 5.744562647 + 1 Combine like terms: -1 + 1 = 0 0 + x = 5.744562647 + 1 x = 5.744562647 + 1 Combine like terms: 5.744562647 + 1 = 6.744562647 x = 6.744562647 Simplifying x = 6.744562647

Subproblem 2

x + -1 = -5.744562647 Simplifying x + -1 = -5.744562647 Reorder the terms: -1 + x = -5.744562647 Solving -1 + x = -5.744562647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -5.744562647 + 1 Combine like terms: -1 + 1 = 0 0 + x = -5.744562647 + 1 x = -5.744562647 + 1 Combine like terms: -5.744562647 + 1 = -4.744562647 x = -4.744562647 Simplifying x = -4.744562647

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.744562647, -4.744562647}

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