9x(x+3)=4x-3

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Solution for 9x(x+3)=4x-3 equation:


Simplifying
9x(x + 3) = 4x + -3

Reorder the terms:
9x(3 + x) = 4x + -3
(3 * 9x + x * 9x) = 4x + -3
(27x + 9x2) = 4x + -3

Reorder the terms:
27x + 9x2 = -3 + 4x

Solving
27x + 9x2 = -3 + 4x

Solving for variable 'x'.

Reorder the terms:
3 + 27x + -4x + 9x2 = -3 + 4x + 3 + -4x

Combine like terms: 27x + -4x = 23x
3 + 23x + 9x2 = -3 + 4x + 3 + -4x

Reorder the terms:
3 + 23x + 9x2 = -3 + 3 + 4x + -4x

Combine like terms: -3 + 3 = 0
3 + 23x + 9x2 = 0 + 4x + -4x
3 + 23x + 9x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
3 + 23x + 9x2 = 0

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

Divide each side by '9'.
0.3333333333 + 2.555555556x + x2 = 0

Move the constant term to the right:

Add '-0.3333333333' to each side of the equation.
0.3333333333 + 2.555555556x + -0.3333333333 + x2 = 0 + -0.3333333333

Reorder the terms:
0.3333333333 + -0.3333333333 + 2.555555556x + x2 = 0 + -0.3333333333

Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000
0.0000000000 + 2.555555556x + x2 = 0 + -0.3333333333
2.555555556x + x2 = 0 + -0.3333333333

Combine like terms: 0 + -0.3333333333 = -0.3333333333
2.555555556x + x2 = -0.3333333333

The x term is 2.555555556x.  Take half its coefficient (1.277777778).
Square it (1.632716050) and add it to both sides.

Add '1.632716050' to each side of the equation.
2.555555556x + 1.632716050 + x2 = -0.3333333333 + 1.632716050

Reorder the terms:
1.632716050 + 2.555555556x + x2 = -0.3333333333 + 1.632716050

Combine like terms: -0.3333333333 + 1.632716050 = 1.2993827167
1.632716050 + 2.555555556x + x2 = 1.2993827167

Factor a perfect square on the left side:
(x + 1.277777778)(x + 1.277777778) = 1.2993827167

Calculate the square root of the right side: 1.139904696

Break this problem into two subproblems by setting 
(x + 1.277777778) equal to 1.139904696 and -1.139904696.

Subproblem 1

x + 1.277777778 = 1.139904696 Simplifying x + 1.277777778 = 1.139904696 Reorder the terms: 1.277777778 + x = 1.139904696 Solving 1.277777778 + x = 1.139904696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.277777778' to each side of the equation. 1.277777778 + -1.277777778 + x = 1.139904696 + -1.277777778 Combine like terms: 1.277777778 + -1.277777778 = 0.000000000 0.000000000 + x = 1.139904696 + -1.277777778 x = 1.139904696 + -1.277777778 Combine like terms: 1.139904696 + -1.277777778 = -0.137873082 x = -0.137873082 Simplifying x = -0.137873082

Subproblem 2

x + 1.277777778 = -1.139904696 Simplifying x + 1.277777778 = -1.139904696 Reorder the terms: 1.277777778 + x = -1.139904696 Solving 1.277777778 + x = -1.139904696 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.277777778' to each side of the equation. 1.277777778 + -1.277777778 + x = -1.139904696 + -1.277777778 Combine like terms: 1.277777778 + -1.277777778 = 0.000000000 0.000000000 + x = -1.139904696 + -1.277777778 x = -1.139904696 + -1.277777778 Combine like terms: -1.139904696 + -1.277777778 = -2.417682474 x = -2.417682474 Simplifying x = -2.417682474

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.137873082, -2.417682474}

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