(x-1)(x-5)=7

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Solution for (x-1)(x-5)=7 equation:


Simplifying
(x + -1)(x + -5) = 7

Reorder the terms:
(-1 + x)(x + -5) = 7

Reorder the terms:
(-1 + x)(-5 + x) = 7

Multiply (-1 + x) * (-5 + x)
(-1(-5 + x) + x(-5 + x)) = 7
((-5 * -1 + x * -1) + x(-5 + x)) = 7
((5 + -1x) + x(-5 + x)) = 7
(5 + -1x + (-5 * x + x * x)) = 7
(5 + -1x + (-5x + x2)) = 7

Combine like terms: -1x + -5x = -6x
(5 + -6x + x2) = 7

Solving
5 + -6x + x2 = 7

Solving for variable 'x'.

Reorder the terms:
5 + -7 + -6x + x2 = 7 + -7

Combine like terms: 5 + -7 = -2
-2 + -6x + x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-2 + -6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -6x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -6x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -6x + x2 = 0 + 2
-6x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-6x + x2 = 2

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 = 2 + 9

Reorder the terms:
9 + -6x + x2 = 2 + 9

Combine like terms: 2 + 9 = 11
9 + -6x + x2 = 11

Factor a perfect square on the left side:
(x + -3)(x + -3) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(x + -3) equal to 3.31662479 and -3.31662479.

Subproblem 1

x + -3 = 3.31662479 Simplifying x + -3 = 3.31662479 Reorder the terms: -3 + x = 3.31662479 Solving -3 + x = 3.31662479 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 = 3.31662479 + 3 Combine like terms: -3 + 3 = 0 0 + x = 3.31662479 + 3 x = 3.31662479 + 3 Combine like terms: 3.31662479 + 3 = 6.31662479 x = 6.31662479 Simplifying x = 6.31662479

Subproblem 2

x + -3 = -3.31662479 Simplifying x + -3 = -3.31662479 Reorder the terms: -3 + x = -3.31662479 Solving -3 + x = -3.31662479 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 = -3.31662479 + 3 Combine like terms: -3 + 3 = 0 0 + x = -3.31662479 + 3 x = -3.31662479 + 3 Combine like terms: -3.31662479 + 3 = -0.31662479 x = -0.31662479 Simplifying x = -0.31662479

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.31662479, -0.31662479}

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