(x-2)(x-4)=5

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Solution for (x-2)(x-4)=5 equation:


Simplifying
(x + -2)(x + -4) = 5

Reorder the terms:
(-2 + x)(x + -4) = 5

Reorder the terms:
(-2 + x)(-4 + x) = 5

Multiply (-2 + x) * (-4 + x)
(-2(-4 + x) + x(-4 + x)) = 5
((-4 * -2 + x * -2) + x(-4 + x)) = 5
((8 + -2x) + x(-4 + x)) = 5
(8 + -2x + (-4 * x + x * x)) = 5
(8 + -2x + (-4x + x2)) = 5

Combine like terms: -2x + -4x = -6x
(8 + -6x + x2) = 5

Solving
8 + -6x + x2 = 5

Solving for variable 'x'.

Reorder the terms:
8 + -5 + -6x + x2 = 5 + -5

Combine like terms: 8 + -5 = 3
3 + -6x + x2 = 5 + -5

Combine like terms: 5 + -5 = 0
3 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -6x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + -6x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -6x + x2 = 0 + -3
-6x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
-6x + x2 = -3

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -3 + 9

Reorder the terms:
9 + -6x + x2 = -3 + 9

Combine like terms: -3 + 9 = 6
9 + -6x + x2 = 6

Factor a perfect square on the left side:
(x + -3)(x + -3) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + -3) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + -3 = 2.449489743 Simplifying x + -3 = 2.449489743 Reorder the terms: -3 + x = 2.449489743 Solving -3 + x = 2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 2.449489743 + 3 Combine like terms: -3 + 3 = 0 0 + x = 2.449489743 + 3 x = 2.449489743 + 3 Combine like terms: 2.449489743 + 3 = 5.449489743 x = 5.449489743 Simplifying x = 5.449489743

Subproblem 2

x + -3 = -2.449489743 Simplifying x + -3 = -2.449489743 Reorder the terms: -3 + x = -2.449489743 Solving -3 + x = -2.449489743 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -2.449489743 + 3 Combine like terms: -3 + 3 = 0 0 + x = -2.449489743 + 3 x = -2.449489743 + 3 Combine like terms: -2.449489743 + 3 = 0.550510257 x = 0.550510257 Simplifying x = 0.550510257

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.449489743, 0.550510257}

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