x(x+4)+2(x+3)=5

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Solution for x(x+4)+2(x+3)=5 equation:


Simplifying
x(x + 4) + 2(x + 3) = 5

Reorder the terms:
x(4 + x) + 2(x + 3) = 5
(4 * x + x * x) + 2(x + 3) = 5
(4x + x2) + 2(x + 3) = 5

Reorder the terms:
4x + x2 + 2(3 + x) = 5
4x + x2 + (3 * 2 + x * 2) = 5
4x + x2 + (6 + 2x) = 5

Reorder the terms:
6 + 4x + 2x + x2 = 5

Combine like terms: 4x + 2x = 6x
6 + 6x + x2 = 5

Solving
6 + 6x + x2 = 5

Solving for variable 'x'.

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

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

Combine like terms: 5 + -5 = 0
1 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 6x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + 6x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 6x + x2 = 0 + -1
6x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
6x + x2 = -1

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 = -1 + 9

Reorder the terms:
9 + 6x + x2 = -1 + 9

Combine like terms: -1 + 9 = 8
9 + 6x + x2 = 8

Factor a perfect square on the left side:
(x + 3)(x + 3) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(x + 3) equal to 2.828427125 and -2.828427125.

Subproblem 1

x + 3 = 2.828427125 Simplifying x + 3 = 2.828427125 Reorder the terms: 3 + x = 2.828427125 Solving 3 + x = 2.828427125 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 = 2.828427125 + -3 Combine like terms: 3 + -3 = 0 0 + x = 2.828427125 + -3 x = 2.828427125 + -3 Combine like terms: 2.828427125 + -3 = -0.171572875 x = -0.171572875 Simplifying x = -0.171572875

Subproblem 2

x + 3 = -2.828427125 Simplifying x + 3 = -2.828427125 Reorder the terms: 3 + x = -2.828427125 Solving 3 + x = -2.828427125 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 = -2.828427125 + -3 Combine like terms: 3 + -3 = 0 0 + x = -2.828427125 + -3 x = -2.828427125 + -3 Combine like terms: -2.828427125 + -3 = -5.828427125 x = -5.828427125 Simplifying x = -5.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.171572875, -5.828427125}

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