(3x+1)(4x-3)=33

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Solution for (3x+1)(4x-3)=33 equation:


Simplifying
(3x + 1)(4x + -3) = 33

Reorder the terms:
(1 + 3x)(4x + -3) = 33

Reorder the terms:
(1 + 3x)(-3 + 4x) = 33

Multiply (1 + 3x) * (-3 + 4x)
(1(-3 + 4x) + 3x * (-3 + 4x)) = 33
((-3 * 1 + 4x * 1) + 3x * (-3 + 4x)) = 33
((-3 + 4x) + 3x * (-3 + 4x)) = 33
(-3 + 4x + (-3 * 3x + 4x * 3x)) = 33
(-3 + 4x + (-9x + 12x2)) = 33

Combine like terms: 4x + -9x = -5x
(-3 + -5x + 12x2) = 33

Solving
-3 + -5x + 12x2 = 33

Solving for variable 'x'.

Reorder the terms:
-3 + -33 + -5x + 12x2 = 33 + -33

Combine like terms: -3 + -33 = -36
-36 + -5x + 12x2 = 33 + -33

Combine like terms: 33 + -33 = 0
-36 + -5x + 12x2 = 0

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

Divide each side by '12'.
-3 + -0.4166666667x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -0.4166666667x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -0.4166666667x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -0.4166666667x + x2 = 0 + 3
-0.4166666667x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-0.4166666667x + x2 = 3

The x term is -0.4166666667x.  Take half its coefficient (-0.2083333334).
Square it (0.04340277781) and add it to both sides.

Add '0.04340277781' to each side of the equation.
-0.4166666667x + 0.04340277781 + x2 = 3 + 0.04340277781

Reorder the terms:
0.04340277781 + -0.4166666667x + x2 = 3 + 0.04340277781

Combine like terms: 3 + 0.04340277781 = 3.04340277781
0.04340277781 + -0.4166666667x + x2 = 3.04340277781

Factor a perfect square on the left side:
(x + -0.2083333334)(x + -0.2083333334) = 3.04340277781

Calculate the square root of the right side: 1.744535118

Break this problem into two subproblems by setting 
(x + -0.2083333334) equal to 1.744535118 and -1.744535118.

Subproblem 1

x + -0.2083333334 = 1.744535118 Simplifying x + -0.2083333334 = 1.744535118 Reorder the terms: -0.2083333334 + x = 1.744535118 Solving -0.2083333334 + x = 1.744535118 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2083333334' to each side of the equation. -0.2083333334 + 0.2083333334 + x = 1.744535118 + 0.2083333334 Combine like terms: -0.2083333334 + 0.2083333334 = 0.0000000000 0.0000000000 + x = 1.744535118 + 0.2083333334 x = 1.744535118 + 0.2083333334 Combine like terms: 1.744535118 + 0.2083333334 = 1.9528684514 x = 1.9528684514 Simplifying x = 1.9528684514

Subproblem 2

x + -0.2083333334 = -1.744535118 Simplifying x + -0.2083333334 = -1.744535118 Reorder the terms: -0.2083333334 + x = -1.744535118 Solving -0.2083333334 + x = -1.744535118 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2083333334' to each side of the equation. -0.2083333334 + 0.2083333334 + x = -1.744535118 + 0.2083333334 Combine like terms: -0.2083333334 + 0.2083333334 = 0.0000000000 0.0000000000 + x = -1.744535118 + 0.2083333334 x = -1.744535118 + 0.2083333334 Combine like terms: -1.744535118 + 0.2083333334 = -1.5362017846 x = -1.5362017846 Simplifying x = -1.5362017846

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.9528684514, -1.5362017846}

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