2x(x+5)=x(3x-1)-4

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Solution for 2x(x+5)=x(3x-1)-4 equation:


Simplifying
2x(x + 5) = x(3x + -1) + -4

Reorder the terms:
2x(5 + x) = x(3x + -1) + -4
(5 * 2x + x * 2x) = x(3x + -1) + -4
(10x + 2x2) = x(3x + -1) + -4

Reorder the terms:
10x + 2x2 = x(-1 + 3x) + -4
10x + 2x2 = (-1 * x + 3x * x) + -4
10x + 2x2 = (-1x + 3x2) + -4

Reorder the terms:
10x + 2x2 = -4 + -1x + 3x2

Solving
10x + 2x2 = -4 + -1x + 3x2

Solving for variable 'x'.

Reorder the terms:
4 + 10x + x + 2x2 + -3x2 = -4 + -1x + 3x2 + 4 + x + -3x2

Combine like terms: 10x + x = 11x
4 + 11x + 2x2 + -3x2 = -4 + -1x + 3x2 + 4 + x + -3x2

Combine like terms: 2x2 + -3x2 = -1x2
4 + 11x + -1x2 = -4 + -1x + 3x2 + 4 + x + -3x2

Reorder the terms:
4 + 11x + -1x2 = -4 + 4 + -1x + x + 3x2 + -3x2

Combine like terms: -4 + 4 = 0
4 + 11x + -1x2 = 0 + -1x + x + 3x2 + -3x2
4 + 11x + -1x2 = -1x + x + 3x2 + -3x2

Combine like terms: -1x + x = 0
4 + 11x + -1x2 = 0 + 3x2 + -3x2
4 + 11x + -1x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
4 + 11x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-4 + -11x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -11x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + -11x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -11x + x2 = 0 + 4
-11x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
-11x + x2 = 4

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = 4 + 30.25

Reorder the terms:
30.25 + -11x + x2 = 4 + 30.25

Combine like terms: 4 + 30.25 = 34.25
30.25 + -11x + x2 = 34.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 34.25

Calculate the square root of the right side: 5.852349955

Break this problem into two subproblems by setting 
(x + -5.5) equal to 5.852349955 and -5.852349955.

Subproblem 1

x + -5.5 = 5.852349955 Simplifying x + -5.5 = 5.852349955 Reorder the terms: -5.5 + x = 5.852349955 Solving -5.5 + x = 5.852349955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 5.852349955 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 5.852349955 + 5.5 x = 5.852349955 + 5.5 Combine like terms: 5.852349955 + 5.5 = 11.352349955 x = 11.352349955 Simplifying x = 11.352349955

Subproblem 2

x + -5.5 = -5.852349955 Simplifying x + -5.5 = -5.852349955 Reorder the terms: -5.5 + x = -5.852349955 Solving -5.5 + x = -5.852349955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -5.852349955 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -5.852349955 + 5.5 x = -5.852349955 + 5.5 Combine like terms: -5.852349955 + 5.5 = -0.352349955 x = -0.352349955 Simplifying x = -0.352349955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.352349955, -0.352349955}

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