(x-1)(x+3)=2

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Solution for (x-1)(x+3)=2 equation:


Simplifying
(x + -1)(x + 3) = 2

Reorder the terms:
(-1 + x)(x + 3) = 2

Reorder the terms:
(-1 + x)(3 + x) = 2

Multiply (-1 + x) * (3 + x)
(-1(3 + x) + x(3 + x)) = 2
((3 * -1 + x * -1) + x(3 + x)) = 2
((-3 + -1x) + x(3 + x)) = 2
(-3 + -1x + (3 * x + x * x)) = 2
(-3 + -1x + (3x + x2)) = 2

Combine like terms: -1x + 3x = 2x
(-3 + 2x + x2) = 2

Solving
-3 + 2x + x2 = 2

Solving for variable 'x'.

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

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

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

Begin completing the square.

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + 2x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + 2x + x2 = 0 + 5

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

Combine like terms: 0 + 5 = 5
2x + x2 = 5

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 = 5 + 1

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

Combine like terms: 5 + 1 = 6
1 + 2x + x2 = 6

Factor a perfect square on the left side:
(x + 1)(x + 1) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + 1) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + 1 = 2.449489743 Simplifying x + 1 = 2.449489743 Reorder the terms: 1 + x = 2.449489743 Solving 1 + x = 2.449489743 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 = 2.449489743 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.449489743 + -1 x = 2.449489743 + -1 Combine like terms: 2.449489743 + -1 = 1.449489743 x = 1.449489743 Simplifying x = 1.449489743

Subproblem 2

x + 1 = -2.449489743 Simplifying x + 1 = -2.449489743 Reorder the terms: 1 + x = -2.449489743 Solving 1 + x = -2.449489743 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 = -2.449489743 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.449489743 + -1 x = -2.449489743 + -1 Combine like terms: -2.449489743 + -1 = -3.449489743 x = -3.449489743 Simplifying x = -3.449489743

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.449489743, -3.449489743}

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