27x^2-20x-6=0

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Solution for 27x^2-20x-6=0 equation:


Simplifying
27x2 + -20x + -6 = 0

Reorder the terms:
-6 + -20x + 27x2 = 0

Solving
-6 + -20x + 27x2 = 0

Solving for variable 'x'.

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

Divide each side by '27'.
-0.2222222222 + -0.7407407407x + x2 = 0

Move the constant term to the right:

Add '0.2222222222' to each side of the equation.
-0.2222222222 + -0.7407407407x + 0.2222222222 + x2 = 0 + 0.2222222222

Reorder the terms:
-0.2222222222 + 0.2222222222 + -0.7407407407x + x2 = 0 + 0.2222222222

Combine like terms: -0.2222222222 + 0.2222222222 = 0.0000000000
0.0000000000 + -0.7407407407x + x2 = 0 + 0.2222222222
-0.7407407407x + x2 = 0 + 0.2222222222

Combine like terms: 0 + 0.2222222222 = 0.2222222222
-0.7407407407x + x2 = 0.2222222222

The x term is -0.7407407407x.  Take half its coefficient (-0.3703703704).
Square it (0.1371742113) and add it to both sides.

Add '0.1371742113' to each side of the equation.
-0.7407407407x + 0.1371742113 + x2 = 0.2222222222 + 0.1371742113

Reorder the terms:
0.1371742113 + -0.7407407407x + x2 = 0.2222222222 + 0.1371742113

Combine like terms: 0.2222222222 + 0.1371742113 = 0.3593964335
0.1371742113 + -0.7407407407x + x2 = 0.3593964335

Factor a perfect square on the left side:
(x + -0.3703703704)(x + -0.3703703704) = 0.3593964335

Calculate the square root of the right side: 0.599496817

Break this problem into two subproblems by setting 
(x + -0.3703703704) equal to 0.599496817 and -0.599496817.

Subproblem 1

x + -0.3703703704 = 0.599496817 Simplifying x + -0.3703703704 = 0.599496817 Reorder the terms: -0.3703703704 + x = 0.599496817 Solving -0.3703703704 + x = 0.599496817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3703703704' to each side of the equation. -0.3703703704 + 0.3703703704 + x = 0.599496817 + 0.3703703704 Combine like terms: -0.3703703704 + 0.3703703704 = 0.0000000000 0.0000000000 + x = 0.599496817 + 0.3703703704 x = 0.599496817 + 0.3703703704 Combine like terms: 0.599496817 + 0.3703703704 = 0.9698671874 x = 0.9698671874 Simplifying x = 0.9698671874

Subproblem 2

x + -0.3703703704 = -0.599496817 Simplifying x + -0.3703703704 = -0.599496817 Reorder the terms: -0.3703703704 + x = -0.599496817 Solving -0.3703703704 + x = -0.599496817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3703703704' to each side of the equation. -0.3703703704 + 0.3703703704 + x = -0.599496817 + 0.3703703704 Combine like terms: -0.3703703704 + 0.3703703704 = 0.0000000000 0.0000000000 + x = -0.599496817 + 0.3703703704 x = -0.599496817 + 0.3703703704 Combine like terms: -0.599496817 + 0.3703703704 = -0.2291264466 x = -0.2291264466 Simplifying x = -0.2291264466

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9698671874, -0.2291264466}

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