(2x-3)(3x+9)=44

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Solution for (2x-3)(3x+9)=44 equation:


Simplifying
(2x + -3)(3x + 9) = 44

Reorder the terms:
(-3 + 2x)(3x + 9) = 44

Reorder the terms:
(-3 + 2x)(9 + 3x) = 44

Multiply (-3 + 2x) * (9 + 3x)
(-3(9 + 3x) + 2x * (9 + 3x)) = 44
((9 * -3 + 3x * -3) + 2x * (9 + 3x)) = 44
((-27 + -9x) + 2x * (9 + 3x)) = 44
(-27 + -9x + (9 * 2x + 3x * 2x)) = 44
(-27 + -9x + (18x + 6x2)) = 44

Combine like terms: -9x + 18x = 9x
(-27 + 9x + 6x2) = 44

Solving
-27 + 9x + 6x2 = 44

Solving for variable 'x'.

Reorder the terms:
-27 + -44 + 9x + 6x2 = 44 + -44

Combine like terms: -27 + -44 = -71
-71 + 9x + 6x2 = 44 + -44

Combine like terms: 44 + -44 = 0
-71 + 9x + 6x2 = 0

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

Divide each side by '6'.
-11.83333333 + 1.5x + x2 = 0

Move the constant term to the right:

Add '11.83333333' to each side of the equation.
-11.83333333 + 1.5x + 11.83333333 + x2 = 0 + 11.83333333

Reorder the terms:
-11.83333333 + 11.83333333 + 1.5x + x2 = 0 + 11.83333333

Combine like terms: -11.83333333 + 11.83333333 = 0.00000000
0.00000000 + 1.5x + x2 = 0 + 11.83333333
1.5x + x2 = 0 + 11.83333333

Combine like terms: 0 + 11.83333333 = 11.83333333
1.5x + x2 = 11.83333333

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 11.83333333 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 11.83333333 + 0.5625

Combine like terms: 11.83333333 + 0.5625 = 12.39583333
0.5625 + 1.5x + x2 = 12.39583333

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 12.39583333

Calculate the square root of the right side: 3.520771695

Break this problem into two subproblems by setting 
(x + 0.75) equal to 3.520771695 and -3.520771695.

Subproblem 1

x + 0.75 = 3.520771695 Simplifying x + 0.75 = 3.520771695 Reorder the terms: 0.75 + x = 3.520771695 Solving 0.75 + x = 3.520771695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 3.520771695 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 3.520771695 + -0.75 x = 3.520771695 + -0.75 Combine like terms: 3.520771695 + -0.75 = 2.770771695 x = 2.770771695 Simplifying x = 2.770771695

Subproblem 2

x + 0.75 = -3.520771695 Simplifying x + 0.75 = -3.520771695 Reorder the terms: 0.75 + x = -3.520771695 Solving 0.75 + x = -3.520771695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -3.520771695 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -3.520771695 + -0.75 x = -3.520771695 + -0.75 Combine like terms: -3.520771695 + -0.75 = -4.270771695 x = -4.270771695 Simplifying x = -4.270771695

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.770771695, -4.270771695}

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