(3x+2)(x+4)-(2x+1)(2x-1)=

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Solution for (3x+2)(x+4)-(2x+1)(2x-1)= equation:


Simplifying
(3x + 2)(x + 4) + -1(2x + 1)(2x + -1) = 0

Reorder the terms:
(2 + 3x)(x + 4) + -1(2x + 1)(2x + -1) = 0

Reorder the terms:
(2 + 3x)(4 + x) + -1(2x + 1)(2x + -1) = 0

Multiply (2 + 3x) * (4 + x)
(2(4 + x) + 3x * (4 + x)) + -1(2x + 1)(2x + -1) = 0
((4 * 2 + x * 2) + 3x * (4 + x)) + -1(2x + 1)(2x + -1) = 0
((8 + 2x) + 3x * (4 + x)) + -1(2x + 1)(2x + -1) = 0
(8 + 2x + (4 * 3x + x * 3x)) + -1(2x + 1)(2x + -1) = 0
(8 + 2x + (12x + 3x2)) + -1(2x + 1)(2x + -1) = 0

Combine like terms: 2x + 12x = 14x
(8 + 14x + 3x2) + -1(2x + 1)(2x + -1) = 0

Reorder the terms:
8 + 14x + 3x2 + -1(1 + 2x)(2x + -1) = 0

Reorder the terms:
8 + 14x + 3x2 + -1(1 + 2x)(-1 + 2x) = 0

Multiply (1 + 2x) * (-1 + 2x)
8 + 14x + 3x2 + -1(1(-1 + 2x) + 2x * (-1 + 2x)) = 0
8 + 14x + 3x2 + -1((-1 * 1 + 2x * 1) + 2x * (-1 + 2x)) = 0
8 + 14x + 3x2 + -1((-1 + 2x) + 2x * (-1 + 2x)) = 0
8 + 14x + 3x2 + -1(-1 + 2x + (-1 * 2x + 2x * 2x)) = 0
8 + 14x + 3x2 + -1(-1 + 2x + (-2x + 4x2)) = 0

Combine like terms: 2x + -2x = 0
8 + 14x + 3x2 + -1(-1 + 0 + 4x2) = 0
8 + 14x + 3x2 + -1(-1 + 4x2) = 0
8 + 14x + 3x2 + (-1 * -1 + 4x2 * -1) = 0
8 + 14x + 3x2 + (1 + -4x2) = 0

Reorder the terms:
8 + 1 + 14x + 3x2 + -4x2 = 0

Combine like terms: 8 + 1 = 9
9 + 14x + 3x2 + -4x2 = 0

Combine like terms: 3x2 + -4x2 = -1x2
9 + 14x + -1x2 = 0

Solving
9 + 14x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-9 + -14x + x2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + -14x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + -14x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -14x + x2 = 0 + 9
-14x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
-14x + x2 = 9

The x term is -14x.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14x + 49 + x2 = 9 + 49

Reorder the terms:
49 + -14x + x2 = 9 + 49

Combine like terms: 9 + 49 = 58
49 + -14x + x2 = 58

Factor a perfect square on the left side:
(x + -7)(x + -7) = 58

Calculate the square root of the right side: 7.615773106

Break this problem into two subproblems by setting 
(x + -7) equal to 7.615773106 and -7.615773106.

Subproblem 1

x + -7 = 7.615773106 Simplifying x + -7 = 7.615773106 Reorder the terms: -7 + x = 7.615773106 Solving -7 + x = 7.615773106 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 7.615773106 + 7 Combine like terms: -7 + 7 = 0 0 + x = 7.615773106 + 7 x = 7.615773106 + 7 Combine like terms: 7.615773106 + 7 = 14.615773106 x = 14.615773106 Simplifying x = 14.615773106

Subproblem 2

x + -7 = -7.615773106 Simplifying x + -7 = -7.615773106 Reorder the terms: -7 + x = -7.615773106 Solving -7 + x = -7.615773106 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = -7.615773106 + 7 Combine like terms: -7 + 7 = 0 0 + x = -7.615773106 + 7 x = -7.615773106 + 7 Combine like terms: -7.615773106 + 7 = -0.615773106 x = -0.615773106 Simplifying x = -0.615773106

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.615773106, -0.615773106}

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