(2x-5)(3x+2)-10=0

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Solution for (2x-5)(3x+2)-10=0 equation:


Simplifying
(2x + -5)(3x + 2) + -10 = 0

Reorder the terms:
(-5 + 2x)(3x + 2) + -10 = 0

Reorder the terms:
(-5 + 2x)(2 + 3x) + -10 = 0

Multiply (-5 + 2x) * (2 + 3x)
(-5(2 + 3x) + 2x * (2 + 3x)) + -10 = 0
((2 * -5 + 3x * -5) + 2x * (2 + 3x)) + -10 = 0
((-10 + -15x) + 2x * (2 + 3x)) + -10 = 0
(-10 + -15x + (2 * 2x + 3x * 2x)) + -10 = 0
(-10 + -15x + (4x + 6x2)) + -10 = 0

Combine like terms: -15x + 4x = -11x
(-10 + -11x + 6x2) + -10 = 0

Reorder the terms:
-10 + -10 + -11x + 6x2 = 0

Combine like terms: -10 + -10 = -20
-20 + -11x + 6x2 = 0

Solving
-20 + -11x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-3.333333333 + -1.833333333x + x2 = 0

Move the constant term to the right:

Add '3.333333333' to each side of the equation.
-3.333333333 + -1.833333333x + 3.333333333 + x2 = 0 + 3.333333333

Reorder the terms:
-3.333333333 + 3.333333333 + -1.833333333x + x2 = 0 + 3.333333333

Combine like terms: -3.333333333 + 3.333333333 = 0.000000000
0.000000000 + -1.833333333x + x2 = 0 + 3.333333333
-1.833333333x + x2 = 0 + 3.333333333

Combine like terms: 0 + 3.333333333 = 3.333333333
-1.833333333x + x2 = 3.333333333

The x term is -1.833333333x.  Take half its coefficient (-0.9166666665).
Square it (0.8402777775) and add it to both sides.

Add '0.8402777775' to each side of the equation.
-1.833333333x + 0.8402777775 + x2 = 3.333333333 + 0.8402777775

Reorder the terms:
0.8402777775 + -1.833333333x + x2 = 3.333333333 + 0.8402777775

Combine like terms: 3.333333333 + 0.8402777775 = 4.1736111105
0.8402777775 + -1.833333333x + x2 = 4.1736111105

Factor a perfect square on the left side:
(x + -0.9166666665)(x + -0.9166666665) = 4.1736111105

Calculate the square root of the right side: 2.042941779

Break this problem into two subproblems by setting 
(x + -0.9166666665) equal to 2.042941779 and -2.042941779.

Subproblem 1

x + -0.9166666665 = 2.042941779 Simplifying x + -0.9166666665 = 2.042941779 Reorder the terms: -0.9166666665 + x = 2.042941779 Solving -0.9166666665 + x = 2.042941779 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = 2.042941779 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = 2.042941779 + 0.9166666665 x = 2.042941779 + 0.9166666665 Combine like terms: 2.042941779 + 0.9166666665 = 2.9596084455 x = 2.9596084455 Simplifying x = 2.9596084455

Subproblem 2

x + -0.9166666665 = -2.042941779 Simplifying x + -0.9166666665 = -2.042941779 Reorder the terms: -0.9166666665 + x = -2.042941779 Solving -0.9166666665 + x = -2.042941779 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = -2.042941779 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = -2.042941779 + 0.9166666665 x = -2.042941779 + 0.9166666665 Combine like terms: -2.042941779 + 0.9166666665 = -1.1262751125 x = -1.1262751125 Simplifying x = -1.1262751125

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.9596084455, -1.1262751125}

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