4x+(x+6)*(x+3)=0

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Solution for 4x+(x+6)*(x+3)=0 equation:


Simplifying
4x + (x + 6)(x + 3) = 0

Reorder the terms:
4x + (6 + x)(x + 3) = 0

Reorder the terms:
4x + (6 + x)(3 + x) = 0

Multiply (6 + x) * (3 + x)
4x + (6(3 + x) + x(3 + x)) = 0
4x + ((3 * 6 + x * 6) + x(3 + x)) = 0
4x + ((18 + 6x) + x(3 + x)) = 0
4x + (18 + 6x + (3 * x + x * x)) = 0
4x + (18 + 6x + (3x + x2)) = 0

Combine like terms: 6x + 3x = 9x
4x + (18 + 9x + x2) = 0

Reorder the terms:
18 + 4x + 9x + x2 = 0

Combine like terms: 4x + 9x = 13x
18 + 13x + x2 = 0

Solving
18 + 13x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + 13x + -18 + x2 = 0 + -18

Reorder the terms:
18 + -18 + 13x + x2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 13x + x2 = 0 + -18
13x + x2 = 0 + -18

Combine like terms: 0 + -18 = -18
13x + x2 = -18

The x term is 13x.  Take half its coefficient (6.5).
Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.
13x + 42.25 + x2 = -18 + 42.25

Reorder the terms:
42.25 + 13x + x2 = -18 + 42.25

Combine like terms: -18 + 42.25 = 24.25
42.25 + 13x + x2 = 24.25

Factor a perfect square on the left side:
(x + 6.5)(x + 6.5) = 24.25

Calculate the square root of the right side: 4.924428901

Break this problem into two subproblems by setting 
(x + 6.5) equal to 4.924428901 and -4.924428901.

Subproblem 1

x + 6.5 = 4.924428901 Simplifying x + 6.5 = 4.924428901 Reorder the terms: 6.5 + x = 4.924428901 Solving 6.5 + x = 4.924428901 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.5' to each side of the equation. 6.5 + -6.5 + x = 4.924428901 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + x = 4.924428901 + -6.5 x = 4.924428901 + -6.5 Combine like terms: 4.924428901 + -6.5 = -1.575571099 x = -1.575571099 Simplifying x = -1.575571099

Subproblem 2

x + 6.5 = -4.924428901 Simplifying x + 6.5 = -4.924428901 Reorder the terms: 6.5 + x = -4.924428901 Solving 6.5 + x = -4.924428901 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.5' to each side of the equation. 6.5 + -6.5 + x = -4.924428901 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + x = -4.924428901 + -6.5 x = -4.924428901 + -6.5 Combine like terms: -4.924428901 + -6.5 = -11.424428901 x = -11.424428901 Simplifying x = -11.424428901

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.575571099, -11.424428901}

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