(x-4)(x-7)=6

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Solution for (x-4)(x-7)=6 equation:


Simplifying
(x + -4)(x + -7) = 6

Reorder the terms:
(-4 + x)(x + -7) = 6

Reorder the terms:
(-4 + x)(-7 + x) = 6

Multiply (-4 + x) * (-7 + x)
(-4(-7 + x) + x(-7 + x)) = 6
((-7 * -4 + x * -4) + x(-7 + x)) = 6
((28 + -4x) + x(-7 + x)) = 6
(28 + -4x + (-7 * x + x * x)) = 6
(28 + -4x + (-7x + x2)) = 6

Combine like terms: -4x + -7x = -11x
(28 + -11x + x2) = 6

Solving
28 + -11x + x2 = 6

Solving for variable 'x'.

Reorder the terms:
28 + -6 + -11x + x2 = 6 + -6

Combine like terms: 28 + -6 = 22
22 + -11x + x2 = 6 + -6

Combine like terms: 6 + -6 = 0
22 + -11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-22' to each side of the equation.
22 + -11x + -22 + x2 = 0 + -22

Reorder the terms:
22 + -22 + -11x + x2 = 0 + -22

Combine like terms: 22 + -22 = 0
0 + -11x + x2 = 0 + -22
-11x + x2 = 0 + -22

Combine like terms: 0 + -22 = -22
-11x + x2 = -22

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = -22 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -22 + 30.25

Combine like terms: -22 + 30.25 = 8.25
30.25 + -11x + x2 = 8.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 8.25

Calculate the square root of the right side: 2.872281323

Break this problem into two subproblems by setting 
(x + -5.5) equal to 2.872281323 and -2.872281323.

Subproblem 1

x + -5.5 = 2.872281323 Simplifying x + -5.5 = 2.872281323 Reorder the terms: -5.5 + x = 2.872281323 Solving -5.5 + x = 2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 2.872281323 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 2.872281323 + 5.5 x = 2.872281323 + 5.5 Combine like terms: 2.872281323 + 5.5 = 8.372281323 x = 8.372281323 Simplifying x = 8.372281323

Subproblem 2

x + -5.5 = -2.872281323 Simplifying x + -5.5 = -2.872281323 Reorder the terms: -5.5 + x = -2.872281323 Solving -5.5 + x = -2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -2.872281323 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -2.872281323 + 5.5 x = -2.872281323 + 5.5 Combine like terms: -2.872281323 + 5.5 = 2.627718677 x = 2.627718677 Simplifying x = 2.627718677

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.372281323, 2.627718677}

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