13x^2-3x-10=x

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Solution for 13x^2-3x-10=x equation:


Simplifying
13x2 + -3x + -10 = x

Reorder the terms:
-10 + -3x + 13x2 = x

Solving
-10 + -3x + 13x2 = x

Solving for variable 'x'.

Reorder the terms:
-10 + -3x + -1x + 13x2 = x + -1x

Combine like terms: -3x + -1x = -4x
-10 + -4x + 13x2 = x + -1x

Combine like terms: x + -1x = 0
-10 + -4x + 13x2 = 0

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

Divide each side by '13'.
-0.7692307692 + -0.3076923077x + x2 = 0

Move the constant term to the right:

Add '0.7692307692' to each side of the equation.
-0.7692307692 + -0.3076923077x + 0.7692307692 + x2 = 0 + 0.7692307692

Reorder the terms:
-0.7692307692 + 0.7692307692 + -0.3076923077x + x2 = 0 + 0.7692307692

Combine like terms: -0.7692307692 + 0.7692307692 = 0.0000000000
0.0000000000 + -0.3076923077x + x2 = 0 + 0.7692307692
-0.3076923077x + x2 = 0 + 0.7692307692

Combine like terms: 0 + 0.7692307692 = 0.7692307692
-0.3076923077x + x2 = 0.7692307692

The x term is -0.3076923077x.  Take half its coefficient (-0.1538461539).
Square it (0.02366863907) and add it to both sides.

Add '0.02366863907' to each side of the equation.
-0.3076923077x + 0.02366863907 + x2 = 0.7692307692 + 0.02366863907

Reorder the terms:
0.02366863907 + -0.3076923077x + x2 = 0.7692307692 + 0.02366863907

Combine like terms: 0.7692307692 + 0.02366863907 = 0.79289940827
0.02366863907 + -0.3076923077x + x2 = 0.79289940827

Factor a perfect square on the left side:
(x + -0.1538461539)(x + -0.1538461539) = 0.79289940827

Calculate the square root of the right side: 0.890448993

Break this problem into two subproblems by setting 
(x + -0.1538461539) equal to 0.890448993 and -0.890448993.

Subproblem 1

x + -0.1538461539 = 0.890448993 Simplifying x + -0.1538461539 = 0.890448993 Reorder the terms: -0.1538461539 + x = 0.890448993 Solving -0.1538461539 + x = 0.890448993 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1538461539' to each side of the equation. -0.1538461539 + 0.1538461539 + x = 0.890448993 + 0.1538461539 Combine like terms: -0.1538461539 + 0.1538461539 = 0.0000000000 0.0000000000 + x = 0.890448993 + 0.1538461539 x = 0.890448993 + 0.1538461539 Combine like terms: 0.890448993 + 0.1538461539 = 1.0442951469 x = 1.0442951469 Simplifying x = 1.0442951469

Subproblem 2

x + -0.1538461539 = -0.890448993 Simplifying x + -0.1538461539 = -0.890448993 Reorder the terms: -0.1538461539 + x = -0.890448993 Solving -0.1538461539 + x = -0.890448993 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1538461539' to each side of the equation. -0.1538461539 + 0.1538461539 + x = -0.890448993 + 0.1538461539 Combine like terms: -0.1538461539 + 0.1538461539 = 0.0000000000 0.0000000000 + x = -0.890448993 + 0.1538461539 x = -0.890448993 + 0.1538461539 Combine like terms: -0.890448993 + 0.1538461539 = -0.7366028391 x = -0.7366028391 Simplifying x = -0.7366028391

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.0442951469, -0.7366028391}

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