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

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


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

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

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

Multiply (5 + 3x) * (-3 + 2x)
(5(-3 + 2x) + 3x * (-3 + 2x)) = -5
((-3 * 5 + 2x * 5) + 3x * (-3 + 2x)) = -5
((-15 + 10x) + 3x * (-3 + 2x)) = -5
(-15 + 10x + (-3 * 3x + 2x * 3x)) = -5
(-15 + 10x + (-9x + 6x2)) = -5

Combine like terms: 10x + -9x = 1x
(-15 + 1x + 6x2) = -5

Solving
-15 + 1x + 6x2 = -5

Solving for variable 'x'.

Reorder the terms:
-15 + 5 + 1x + 6x2 = -5 + 5

Combine like terms: -15 + 5 = -10
-10 + 1x + 6x2 = -5 + 5

Combine like terms: -5 + 5 = 0
-10 + 1x + 6x2 = 0

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

Divide each side by '6'.
-1.666666667 + 0.1666666667x + x2 = 0

Move the constant term to the right:

Add '1.666666667' to each side of the equation.
-1.666666667 + 0.1666666667x + 1.666666667 + x2 = 0 + 1.666666667

Reorder the terms:
-1.666666667 + 1.666666667 + 0.1666666667x + x2 = 0 + 1.666666667

Combine like terms: -1.666666667 + 1.666666667 = 0.000000000
0.000000000 + 0.1666666667x + x2 = 0 + 1.666666667
0.1666666667x + x2 = 0 + 1.666666667

Combine like terms: 0 + 1.666666667 = 1.666666667
0.1666666667x + x2 = 1.666666667

The x term is 0.1666666667x.  Take half its coefficient (0.08333333335).
Square it (0.006944444447) and add it to both sides.

Add '0.006944444447' to each side of the equation.
0.1666666667x + 0.006944444447 + x2 = 1.666666667 + 0.006944444447

Reorder the terms:
0.006944444447 + 0.1666666667x + x2 = 1.666666667 + 0.006944444447

Combine like terms: 1.666666667 + 0.006944444447 = 1.673611111447
0.006944444447 + 0.1666666667x + x2 = 1.673611111447

Factor a perfect square on the left side:
(x + 0.08333333335)(x + 0.08333333335) = 1.673611111447

Calculate the square root of the right side: 1.293681225

Break this problem into two subproblems by setting 
(x + 0.08333333335) equal to 1.293681225 and -1.293681225.

Subproblem 1

x + 0.08333333335 = 1.293681225 Simplifying x + 0.08333333335 = 1.293681225 Reorder the terms: 0.08333333335 + x = 1.293681225 Solving 0.08333333335 + x = 1.293681225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.08333333335' to each side of the equation. 0.08333333335 + -0.08333333335 + x = 1.293681225 + -0.08333333335 Combine like terms: 0.08333333335 + -0.08333333335 = 0.00000000000 0.00000000000 + x = 1.293681225 + -0.08333333335 x = 1.293681225 + -0.08333333335 Combine like terms: 1.293681225 + -0.08333333335 = 1.21034789165 x = 1.21034789165 Simplifying x = 1.21034789165

Subproblem 2

x + 0.08333333335 = -1.293681225 Simplifying x + 0.08333333335 = -1.293681225 Reorder the terms: 0.08333333335 + x = -1.293681225 Solving 0.08333333335 + x = -1.293681225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.08333333335' to each side of the equation. 0.08333333335 + -0.08333333335 + x = -1.293681225 + -0.08333333335 Combine like terms: 0.08333333335 + -0.08333333335 = 0.00000000000 0.00000000000 + x = -1.293681225 + -0.08333333335 x = -1.293681225 + -0.08333333335 Combine like terms: -1.293681225 + -0.08333333335 = -1.37701455835 x = -1.37701455835 Simplifying x = -1.37701455835

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.21034789165, -1.37701455835}

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