20X^2-23X-6=0

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Solution for 20X^2-23X-6=0 equation:


Simplifying
20X2 + -23X + -6 = 0

Reorder the terms:
-6 + -23X + 20X2 = 0

Solving
-6 + -23X + 20X2 = 0

Solving for variable 'X'.

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

Divide each side by '20'.
-0.3 + -1.15X + X2 = 0

Move the constant term to the right:

Add '0.3' to each side of the equation.
-0.3 + -1.15X + 0.3 + X2 = 0 + 0.3

Reorder the terms:
-0.3 + 0.3 + -1.15X + X2 = 0 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + -1.15X + X2 = 0 + 0.3
-1.15X + X2 = 0 + 0.3

Combine like terms: 0 + 0.3 = 0.3
-1.15X + X2 = 0.3

The X term is -1.15X.  Take half its coefficient (-0.575).
Square it (0.330625) and add it to both sides.

Add '0.330625' to each side of the equation.
-1.15X + 0.330625 + X2 = 0.3 + 0.330625

Reorder the terms:
0.330625 + -1.15X + X2 = 0.3 + 0.330625

Combine like terms: 0.3 + 0.330625 = 0.630625
0.330625 + -1.15X + X2 = 0.630625

Factor a perfect square on the left side:
(X + -0.575)(X + -0.575) = 0.630625

Calculate the square root of the right side: 0.794119009

Break this problem into two subproblems by setting 
(X + -0.575) equal to 0.794119009 and -0.794119009.

Subproblem 1

X + -0.575 = 0.794119009 Simplifying X + -0.575 = 0.794119009 Reorder the terms: -0.575 + X = 0.794119009 Solving -0.575 + X = 0.794119009 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.575' to each side of the equation. -0.575 + 0.575 + X = 0.794119009 + 0.575 Combine like terms: -0.575 + 0.575 = 0.000 0.000 + X = 0.794119009 + 0.575 X = 0.794119009 + 0.575 Combine like terms: 0.794119009 + 0.575 = 1.369119009 X = 1.369119009 Simplifying X = 1.369119009

Subproblem 2

X + -0.575 = -0.794119009 Simplifying X + -0.575 = -0.794119009 Reorder the terms: -0.575 + X = -0.794119009 Solving -0.575 + X = -0.794119009 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.575' to each side of the equation. -0.575 + 0.575 + X = -0.794119009 + 0.575 Combine like terms: -0.575 + 0.575 = 0.000 0.000 + X = -0.794119009 + 0.575 X = -0.794119009 + 0.575 Combine like terms: -0.794119009 + 0.575 = -0.219119009 X = -0.219119009 Simplifying X = -0.219119009

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.369119009, -0.219119009}

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