(4x-5)(3x+2)-6=7

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Solution for (4x-5)(3x+2)-6=7 equation:


Simplifying
(4x + -5)(3x + 2) + -6 = 7

Reorder the terms:
(-5 + 4x)(3x + 2) + -6 = 7

Reorder the terms:
(-5 + 4x)(2 + 3x) + -6 = 7

Multiply (-5 + 4x) * (2 + 3x)
(-5(2 + 3x) + 4x * (2 + 3x)) + -6 = 7
((2 * -5 + 3x * -5) + 4x * (2 + 3x)) + -6 = 7
((-10 + -15x) + 4x * (2 + 3x)) + -6 = 7
(-10 + -15x + (2 * 4x + 3x * 4x)) + -6 = 7
(-10 + -15x + (8x + 12x2)) + -6 = 7

Combine like terms: -15x + 8x = -7x
(-10 + -7x + 12x2) + -6 = 7

Reorder the terms:
-10 + -6 + -7x + 12x2 = 7

Combine like terms: -10 + -6 = -16
-16 + -7x + 12x2 = 7

Solving
-16 + -7x + 12x2 = 7

Solving for variable 'x'.

Reorder the terms:
-16 + -7 + -7x + 12x2 = 7 + -7

Combine like terms: -16 + -7 = -23
-23 + -7x + 12x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-23 + -7x + 12x2 = 0

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

Divide each side by '12'.
-1.916666667 + -0.5833333333x + x2 = 0

Move the constant term to the right:

Add '1.916666667' to each side of the equation.
-1.916666667 + -0.5833333333x + 1.916666667 + x2 = 0 + 1.916666667

Reorder the terms:
-1.916666667 + 1.916666667 + -0.5833333333x + x2 = 0 + 1.916666667

Combine like terms: -1.916666667 + 1.916666667 = 0.000000000
0.000000000 + -0.5833333333x + x2 = 0 + 1.916666667
-0.5833333333x + x2 = 0 + 1.916666667

Combine like terms: 0 + 1.916666667 = 1.916666667
-0.5833333333x + x2 = 1.916666667

The x term is -0.5833333333x.  Take half its coefficient (-0.2916666667).
Square it (0.08506944446) and add it to both sides.

Add '0.08506944446' to each side of the equation.
-0.5833333333x + 0.08506944446 + x2 = 1.916666667 + 0.08506944446

Reorder the terms:
0.08506944446 + -0.5833333333x + x2 = 1.916666667 + 0.08506944446

Combine like terms: 1.916666667 + 0.08506944446 = 2.00173611146
0.08506944446 + -0.5833333333x + x2 = 2.00173611146

Factor a perfect square on the left side:
(x + -0.2916666667)(x + -0.2916666667) = 2.00173611146

Calculate the square root of the right side: 1.414827237

Break this problem into two subproblems by setting 
(x + -0.2916666667) equal to 1.414827237 and -1.414827237.

Subproblem 1

x + -0.2916666667 = 1.414827237 Simplifying x + -0.2916666667 = 1.414827237 Reorder the terms: -0.2916666667 + x = 1.414827237 Solving -0.2916666667 + x = 1.414827237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + x = 1.414827237 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + x = 1.414827237 + 0.2916666667 x = 1.414827237 + 0.2916666667 Combine like terms: 1.414827237 + 0.2916666667 = 1.7064939037 x = 1.7064939037 Simplifying x = 1.7064939037

Subproblem 2

x + -0.2916666667 = -1.414827237 Simplifying x + -0.2916666667 = -1.414827237 Reorder the terms: -0.2916666667 + x = -1.414827237 Solving -0.2916666667 + x = -1.414827237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + x = -1.414827237 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + x = -1.414827237 + 0.2916666667 x = -1.414827237 + 0.2916666667 Combine like terms: -1.414827237 + 0.2916666667 = -1.1231605703 x = -1.1231605703 Simplifying x = -1.1231605703

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.7064939037, -1.1231605703}

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