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

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


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

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

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

Multiply (3 + 4x) * (1 + x)
(3(1 + x) + 4x * (1 + x)) = 2
((1 * 3 + x * 3) + 4x * (1 + x)) = 2
((3 + 3x) + 4x * (1 + x)) = 2
(3 + 3x + (1 * 4x + x * 4x)) = 2
(3 + 3x + (4x + 4x2)) = 2

Combine like terms: 3x + 4x = 7x
(3 + 7x + 4x2) = 2

Solving
3 + 7x + 4x2 = 2

Solving for variable 'x'.

Reorder the terms:
3 + -2 + 7x + 4x2 = 2 + -2

Combine like terms: 3 + -2 = 1
1 + 7x + 4x2 = 2 + -2

Combine like terms: 2 + -2 = 0
1 + 7x + 4x2 = 0

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

Divide each side by '4'.
0.25 + 1.75x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + 1.75x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + 1.75x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + 1.75x + x2 = 0 + -0.25
1.75x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
1.75x + x2 = -0.25

The x term is 1.75x.  Take half its coefficient (0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
1.75x + 0.765625 + x2 = -0.25 + 0.765625

Reorder the terms:
0.765625 + 1.75x + x2 = -0.25 + 0.765625

Combine like terms: -0.25 + 0.765625 = 0.515625
0.765625 + 1.75x + x2 = 0.515625

Factor a perfect square on the left side:
(x + 0.875)(x + 0.875) = 0.515625

Calculate the square root of the right side: 0.718070331

Break this problem into two subproblems by setting 
(x + 0.875) equal to 0.718070331 and -0.718070331.

Subproblem 1

x + 0.875 = 0.718070331 Simplifying x + 0.875 = 0.718070331 Reorder the terms: 0.875 + x = 0.718070331 Solving 0.875 + x = 0.718070331 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = 0.718070331 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = 0.718070331 + -0.875 x = 0.718070331 + -0.875 Combine like terms: 0.718070331 + -0.875 = -0.156929669 x = -0.156929669 Simplifying x = -0.156929669

Subproblem 2

x + 0.875 = -0.718070331 Simplifying x + 0.875 = -0.718070331 Reorder the terms: 0.875 + x = -0.718070331 Solving 0.875 + x = -0.718070331 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = -0.718070331 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = -0.718070331 + -0.875 x = -0.718070331 + -0.875 Combine like terms: -0.718070331 + -0.875 = -1.593070331 x = -1.593070331 Simplifying x = -1.593070331

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.156929669, -1.593070331}

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