(2x-3)(3x+2)=18

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Solution for (2x-3)(3x+2)=18 equation:


Simplifying
(2x + -3)(3x + 2) = 18

Reorder the terms:
(-3 + 2x)(3x + 2) = 18

Reorder the terms:
(-3 + 2x)(2 + 3x) = 18

Multiply (-3 + 2x) * (2 + 3x)
(-3(2 + 3x) + 2x * (2 + 3x)) = 18
((2 * -3 + 3x * -3) + 2x * (2 + 3x)) = 18
((-6 + -9x) + 2x * (2 + 3x)) = 18
(-6 + -9x + (2 * 2x + 3x * 2x)) = 18
(-6 + -9x + (4x + 6x2)) = 18

Combine like terms: -9x + 4x = -5x
(-6 + -5x + 6x2) = 18

Solving
-6 + -5x + 6x2 = 18

Solving for variable 'x'.

Reorder the terms:
-6 + -18 + -5x + 6x2 = 18 + -18

Combine like terms: -6 + -18 = -24
-24 + -5x + 6x2 = 18 + -18

Combine like terms: 18 + -18 = 0
-24 + -5x + 6x2 = 0

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

Divide each side by '6'.
-4 + -0.8333333333x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -0.8333333333x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + -0.8333333333x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -0.8333333333x + x2 = 0 + 4
-0.8333333333x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
-0.8333333333x + x2 = 4

The x term is -0.8333333333x.  Take half its coefficient (-0.4166666667).
Square it (0.1736111111) and add it to both sides.

Add '0.1736111111' to each side of the equation.
-0.8333333333x + 0.1736111111 + x2 = 4 + 0.1736111111

Reorder the terms:
0.1736111111 + -0.8333333333x + x2 = 4 + 0.1736111111

Combine like terms: 4 + 0.1736111111 = 4.1736111111
0.1736111111 + -0.8333333333x + x2 = 4.1736111111

Factor a perfect square on the left side:
(x + -0.4166666667)(x + -0.4166666667) = 4.1736111111

Calculate the square root of the right side: 2.042941779

Break this problem into two subproblems by setting 
(x + -0.4166666667) equal to 2.042941779 and -2.042941779.

Subproblem 1

x + -0.4166666667 = 2.042941779 Simplifying x + -0.4166666667 = 2.042941779 Reorder the terms: -0.4166666667 + x = 2.042941779 Solving -0.4166666667 + x = 2.042941779 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + x = 2.042941779 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x = 2.042941779 + 0.4166666667 x = 2.042941779 + 0.4166666667 Combine like terms: 2.042941779 + 0.4166666667 = 2.4596084457 x = 2.4596084457 Simplifying x = 2.4596084457

Subproblem 2

x + -0.4166666667 = -2.042941779 Simplifying x + -0.4166666667 = -2.042941779 Reorder the terms: -0.4166666667 + x = -2.042941779 Solving -0.4166666667 + x = -2.042941779 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + x = -2.042941779 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x = -2.042941779 + 0.4166666667 x = -2.042941779 + 0.4166666667 Combine like terms: -2.042941779 + 0.4166666667 = -1.6262751123 x = -1.6262751123 Simplifying x = -1.6262751123

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.4596084457, -1.6262751123}

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