(x-6)(3x+4)=-11

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Solution for (x-6)(3x+4)=-11 equation:


Simplifying
(x + -6)(3x + 4) = -11

Reorder the terms:
(-6 + x)(3x + 4) = -11

Reorder the terms:
(-6 + x)(4 + 3x) = -11

Multiply (-6 + x) * (4 + 3x)
(-6(4 + 3x) + x(4 + 3x)) = -11
((4 * -6 + 3x * -6) + x(4 + 3x)) = -11
((-24 + -18x) + x(4 + 3x)) = -11
(-24 + -18x + (4 * x + 3x * x)) = -11
(-24 + -18x + (4x + 3x2)) = -11

Combine like terms: -18x + 4x = -14x
(-24 + -14x + 3x2) = -11

Solving
-24 + -14x + 3x2 = -11

Solving for variable 'x'.

Reorder the terms:
-24 + 11 + -14x + 3x2 = -11 + 11

Combine like terms: -24 + 11 = -13
-13 + -14x + 3x2 = -11 + 11

Combine like terms: -11 + 11 = 0
-13 + -14x + 3x2 = 0

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

Divide each side by '3'.
-4.333333333 + -4.666666667x + x2 = 0

Move the constant term to the right:

Add '4.333333333' to each side of the equation.
-4.333333333 + -4.666666667x + 4.333333333 + x2 = 0 + 4.333333333

Reorder the terms:
-4.333333333 + 4.333333333 + -4.666666667x + x2 = 0 + 4.333333333

Combine like terms: -4.333333333 + 4.333333333 = 0.000000000
0.000000000 + -4.666666667x + x2 = 0 + 4.333333333
-4.666666667x + x2 = 0 + 4.333333333

Combine like terms: 0 + 4.333333333 = 4.333333333
-4.666666667x + x2 = 4.333333333

The x term is -4.666666667x.  Take half its coefficient (-2.333333334).
Square it (5.444444448) and add it to both sides.

Add '5.444444448' to each side of the equation.
-4.666666667x + 5.444444448 + x2 = 4.333333333 + 5.444444448

Reorder the terms:
5.444444448 + -4.666666667x + x2 = 4.333333333 + 5.444444448

Combine like terms: 4.333333333 + 5.444444448 = 9.777777781
5.444444448 + -4.666666667x + x2 = 9.777777781

Factor a perfect square on the left side:
(x + -2.333333334)(x + -2.333333334) = 9.777777781

Calculate the square root of the right side: 3.12694384

Break this problem into two subproblems by setting 
(x + -2.333333334) equal to 3.12694384 and -3.12694384.

Subproblem 1

x + -2.333333334 = 3.12694384 Simplifying x + -2.333333334 = 3.12694384 Reorder the terms: -2.333333334 + x = 3.12694384 Solving -2.333333334 + x = 3.12694384 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.333333334' to each side of the equation. -2.333333334 + 2.333333334 + x = 3.12694384 + 2.333333334 Combine like terms: -2.333333334 + 2.333333334 = 0.000000000 0.000000000 + x = 3.12694384 + 2.333333334 x = 3.12694384 + 2.333333334 Combine like terms: 3.12694384 + 2.333333334 = 5.460277174 x = 5.460277174 Simplifying x = 5.460277174

Subproblem 2

x + -2.333333334 = -3.12694384 Simplifying x + -2.333333334 = -3.12694384 Reorder the terms: -2.333333334 + x = -3.12694384 Solving -2.333333334 + x = -3.12694384 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.333333334' to each side of the equation. -2.333333334 + 2.333333334 + x = -3.12694384 + 2.333333334 Combine like terms: -2.333333334 + 2.333333334 = 0.000000000 0.000000000 + x = -3.12694384 + 2.333333334 x = -3.12694384 + 2.333333334 Combine like terms: -3.12694384 + 2.333333334 = -0.793610506 x = -0.793610506 Simplifying x = -0.793610506

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.460277174, -0.793610506}

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