(x-1)(x+5)=x+4x-2

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Solution for (x-1)(x+5)=x+4x-2 equation:


Simplifying
(x + -1)(x + 5) = x + 4x + -2

Reorder the terms:
(-1 + x)(x + 5) = x + 4x + -2

Reorder the terms:
(-1 + x)(5 + x) = x + 4x + -2

Multiply (-1 + x) * (5 + x)
(-1(5 + x) + x(5 + x)) = x + 4x + -2
((5 * -1 + x * -1) + x(5 + x)) = x + 4x + -2
((-5 + -1x) + x(5 + x)) = x + 4x + -2
(-5 + -1x + (5 * x + x * x)) = x + 4x + -2
(-5 + -1x + (5x + x2)) = x + 4x + -2

Combine like terms: -1x + 5x = 4x
(-5 + 4x + x2) = x + 4x + -2

Reorder the terms:
-5 + 4x + x2 = -2 + x + 4x

Combine like terms: x + 4x = 5x
-5 + 4x + x2 = -2 + 5x

Solving
-5 + 4x + x2 = -2 + 5x

Solving for variable 'x'.

Reorder the terms:
-5 + 2 + 4x + -5x + x2 = -2 + 5x + 2 + -5x

Combine like terms: -5 + 2 = -3
-3 + 4x + -5x + x2 = -2 + 5x + 2 + -5x

Combine like terms: 4x + -5x = -1x
-3 + -1x + x2 = -2 + 5x + 2 + -5x

Reorder the terms:
-3 + -1x + x2 = -2 + 2 + 5x + -5x

Combine like terms: -2 + 2 = 0
-3 + -1x + x2 = 0 + 5x + -5x
-3 + -1x + x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-3 + -1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -1x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -1x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1x + x2 = 0 + 3
-1x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-1x + x2 = 3

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.
-1x + 0.25 + x2 = 3 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 3 + 0.25

Combine like terms: 3 + 0.25 = 3.25
0.25 + -1x + x2 = 3.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(x + -0.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + -0.5 = 1.802775638 Simplifying x + -0.5 = 1.802775638 Reorder the terms: -0.5 + x = 1.802775638 Solving -0.5 + x = 1.802775638 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 = 1.802775638 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 1.802775638 + 0.5 x = 1.802775638 + 0.5 Combine like terms: 1.802775638 + 0.5 = 2.302775638 x = 2.302775638 Simplifying x = 2.302775638

Subproblem 2

x + -0.5 = -1.802775638 Simplifying x + -0.5 = -1.802775638 Reorder the terms: -0.5 + x = -1.802775638 Solving -0.5 + x = -1.802775638 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 = -1.802775638 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -1.802775638 + 0.5 x = -1.802775638 + 0.5 Combine like terms: -1.802775638 + 0.5 = -1.302775638 x = -1.302775638 Simplifying x = -1.302775638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.302775638, -1.302775638}

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