6x^2-33x-42=0

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Solution for 6x^2-33x-42=0 equation: 


Simplifying
6x2 + -33x + -42 = 0

Reorder the terms:
-42 + -33x + 6x2 = 0

Solving
-42 + -33x + 6x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-14 + -11x + 2x2) = 0

Ignore the factor 3.

Subproblem 1
Set the factor '(-14 + -11x + 2x2)' equal to zero and attempt to solve:

Simplifying
-14 + -11x + 2x2 = 0

Solving
-14 + -11x + 2x2 = 0

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

Divide each side by '2'.
-7 + -5.5x + x2 = 0

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + -5.5x + 7 + x2 = 0 + 7

Reorder the terms:
-7 + 7 + -5.5x + x2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -5.5x + x2 = 0 + 7
-5.5x + x2 = 0 + 7

Combine like terms: 0 + 7 = 7
-5.5x + x2 = 7

The x term is -5.5x.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5x + 7.5625 + x2 = 7 + 7.5625

Reorder the terms:
7.5625 + -5.5x + x2 = 7 + 7.5625

Combine like terms: 7 + 7.5625 = 14.5625
7.5625 + -5.5x + x2 = 14.5625

Factor a perfect square on the left side:
(x + -2.75)(x + -2.75) = 14.5625

Calculate the square root of the right side: 3.816084381

Break this problem into two subproblems by setting 
(x + -2.75) equal to 3.816084381 and -3.816084381.


Subproblem 1
x + -2.75 = 3.816084381

Simplifying
x + -2.75 = 3.816084381

Reorder the terms:
-2.75 + x = 3.816084381

Solving
-2.75 + x = 3.816084381

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '2.75' to each side of the equation.
-2.75 + 2.75 + x = 3.816084381 + 2.75

Combine like terms: -2.75 + 2.75 = 0.00
0.00 + x = 3.816084381 + 2.75
x = 3.816084381 + 2.75

Combine like terms: 3.816084381 + 2.75 = 6.566084381
x = 6.566084381

Simplifying
x = 6.566084381


Subproblem 2
x + -2.75 = -3.816084381

Simplifying
x + -2.75 = -3.816084381

Reorder the terms:
-2.75 + x = -3.816084381

Solving
-2.75 + x = -3.816084381

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '2.75' to each side of the equation.
-2.75 + 2.75 + x = -3.816084381 + 2.75

Combine like terms: -2.75 + 2.75 = 0.00
0.00 + x = -3.816084381 + 2.75
x = -3.816084381 + 2.75

Combine like terms: -3.816084381 + 2.75 = -1.066084381
x = -1.066084381

Simplifying
x = -1.066084381


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {6.566084381, -1.066084381}
Solution
x = {6.566084381, -1.066084381}

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