(x+9)(x-5)=(x+1)2

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Solution for (x+9)(x-5)=(x+1)2 equation:


Simplifying
(x + 9)(x + -5) = (x + 1) * 2

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

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

Multiply (9 + x) * (-5 + x)
(9(-5 + x) + x(-5 + x)) = (x + 1) * 2
((-5 * 9 + x * 9) + x(-5 + x)) = (x + 1) * 2
((-45 + 9x) + x(-5 + x)) = (x + 1) * 2
(-45 + 9x + (-5 * x + x * x)) = (x + 1) * 2
(-45 + 9x + (-5x + x2)) = (x + 1) * 2

Combine like terms: 9x + -5x = 4x
(-45 + 4x + x2) = (x + 1) * 2

Reorder the terms:
-45 + 4x + x2 = (1 + x) * 2

Reorder the terms for easier multiplication:
-45 + 4x + x2 = 2(1 + x)
-45 + 4x + x2 = (1 * 2 + x * 2)
-45 + 4x + x2 = (2 + 2x)

Solving
-45 + 4x + x2 = 2 + 2x

Solving for variable 'x'.

Reorder the terms:
-45 + -2 + 4x + -2x + x2 = 2 + 2x + -2 + -2x

Combine like terms: -45 + -2 = -47
-47 + 4x + -2x + x2 = 2 + 2x + -2 + -2x

Combine like terms: 4x + -2x = 2x
-47 + 2x + x2 = 2 + 2x + -2 + -2x

Reorder the terms:
-47 + 2x + x2 = 2 + -2 + 2x + -2x

Combine like terms: 2 + -2 = 0
-47 + 2x + x2 = 0 + 2x + -2x
-47 + 2x + x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-47 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '47' to each side of the equation.
-47 + 2x + 47 + x2 = 0 + 47

Reorder the terms:
-47 + 47 + 2x + x2 = 0 + 47

Combine like terms: -47 + 47 = 0
0 + 2x + x2 = 0 + 47
2x + x2 = 0 + 47

Combine like terms: 0 + 47 = 47
2x + x2 = 47

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 = 47 + 1

Reorder the terms:
1 + 2x + x2 = 47 + 1

Combine like terms: 47 + 1 = 48
1 + 2x + x2 = 48

Factor a perfect square on the left side:
(x + 1)(x + 1) = 48

Calculate the square root of the right side: 6.92820323

Break this problem into two subproblems by setting 
(x + 1) equal to 6.92820323 and -6.92820323.

Subproblem 1

x + 1 = 6.92820323 Simplifying x + 1 = 6.92820323 Reorder the terms: 1 + x = 6.92820323 Solving 1 + x = 6.92820323 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 = 6.92820323 + -1 Combine like terms: 1 + -1 = 0 0 + x = 6.92820323 + -1 x = 6.92820323 + -1 Combine like terms: 6.92820323 + -1 = 5.92820323 x = 5.92820323 Simplifying x = 5.92820323

Subproblem 2

x + 1 = -6.92820323 Simplifying x + 1 = -6.92820323 Reorder the terms: 1 + x = -6.92820323 Solving 1 + x = -6.92820323 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 = -6.92820323 + -1 Combine like terms: 1 + -1 = 0 0 + x = -6.92820323 + -1 x = -6.92820323 + -1 Combine like terms: -6.92820323 + -1 = -7.92820323 x = -7.92820323 Simplifying x = -7.92820323

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.92820323, -7.92820323}

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