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

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


Simplifying
(3x + 2)(x + 1) = 1

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

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

Multiply (2 + 3x) * (1 + x)
(2(1 + x) + 3x * (1 + x)) = 1
((1 * 2 + x * 2) + 3x * (1 + x)) = 1
((2 + 2x) + 3x * (1 + x)) = 1
(2 + 2x + (1 * 3x + x * 3x)) = 1
(2 + 2x + (3x + 3x2)) = 1

Combine like terms: 2x + 3x = 5x
(2 + 5x + 3x2) = 1

Solving
2 + 5x + 3x2 = 1

Solving for variable 'x'.

Reorder the terms:
2 + -1 + 5x + 3x2 = 1 + -1

Combine like terms: 2 + -1 = 1
1 + 5x + 3x2 = 1 + -1

Combine like terms: 1 + -1 = 0
1 + 5x + 3x2 = 0

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

Divide each side by '3'.
0.3333333333 + 1.666666667x + x2 = 0

Move the constant term to the right:

Add '-0.3333333333' to each side of the equation.
0.3333333333 + 1.666666667x + -0.3333333333 + x2 = 0 + -0.3333333333

Reorder the terms:
0.3333333333 + -0.3333333333 + 1.666666667x + x2 = 0 + -0.3333333333

Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000
0.0000000000 + 1.666666667x + x2 = 0 + -0.3333333333
1.666666667x + x2 = 0 + -0.3333333333

Combine like terms: 0 + -0.3333333333 = -0.3333333333
1.666666667x + x2 = -0.3333333333

The x term is 1.666666667x.  Take half its coefficient (0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
1.666666667x + 0.6944444447 + x2 = -0.3333333333 + 0.6944444447

Reorder the terms:
0.6944444447 + 1.666666667x + x2 = -0.3333333333 + 0.6944444447

Combine like terms: -0.3333333333 + 0.6944444447 = 0.3611111114
0.6944444447 + 1.666666667x + x2 = 0.3611111114

Factor a perfect square on the left side:
(x + 0.8333333335)(x + 0.8333333335) = 0.3611111114

Calculate the square root of the right side: 0.600925213

Break this problem into two subproblems by setting 
(x + 0.8333333335) equal to 0.600925213 and -0.600925213.

Subproblem 1

x + 0.8333333335 = 0.600925213 Simplifying x + 0.8333333335 = 0.600925213 Reorder the terms: 0.8333333335 + x = 0.600925213 Solving 0.8333333335 + x = 0.600925213 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = 0.600925213 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = 0.600925213 + -0.8333333335 x = 0.600925213 + -0.8333333335 Combine like terms: 0.600925213 + -0.8333333335 = -0.2324081205 x = -0.2324081205 Simplifying x = -0.2324081205

Subproblem 2

x + 0.8333333335 = -0.600925213 Simplifying x + 0.8333333335 = -0.600925213 Reorder the terms: 0.8333333335 + x = -0.600925213 Solving 0.8333333335 + x = -0.600925213 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = -0.600925213 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = -0.600925213 + -0.8333333335 x = -0.600925213 + -0.8333333335 Combine like terms: -0.600925213 + -0.8333333335 = -1.4342585465 x = -1.4342585465 Simplifying x = -1.4342585465

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.2324081205, -1.4342585465}

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