4x=13x^2-5

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Solution for 4x=13x^2-5 equation:


Simplifying
4x = 13x2 + -5

Reorder the terms:
4x = -5 + 13x2

Solving
4x = -5 + 13x2

Solving for variable 'x'.

Reorder the terms:
5 + 4x + -13x2 = -5 + 13x2 + 5 + -13x2

Reorder the terms:
5 + 4x + -13x2 = -5 + 5 + 13x2 + -13x2

Combine like terms: -5 + 5 = 0
5 + 4x + -13x2 = 0 + 13x2 + -13x2
5 + 4x + -13x2 = 13x2 + -13x2

Combine like terms: 13x2 + -13x2 = 0
5 + 4x + -13x2 = 0

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

Divide each side by '-13'.
-0.3846153846 + -0.3076923077x + x2 = 0

Move the constant term to the right:

Add '0.3846153846' to each side of the equation.
-0.3846153846 + -0.3076923077x + 0.3846153846 + x2 = 0 + 0.3846153846

Reorder the terms:
-0.3846153846 + 0.3846153846 + -0.3076923077x + x2 = 0 + 0.3846153846

Combine like terms: -0.3846153846 + 0.3846153846 = 0.0000000000
0.0000000000 + -0.3076923077x + x2 = 0 + 0.3846153846
-0.3076923077x + x2 = 0 + 0.3846153846

Combine like terms: 0 + 0.3846153846 = 0.3846153846
-0.3076923077x + x2 = 0.3846153846

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 = 0.3846153846 + 0.02366863907

Reorder the terms:
0.02366863907 + -0.3076923077x + x2 = 0.3846153846 + 0.02366863907

Combine like terms: 0.3846153846 + 0.02366863907 = 0.40828402367
0.02366863907 + -0.3076923077x + x2 = 0.40828402367

Factor a perfect square on the left side:
(x + -0.1538461539)(x + -0.1538461539) = 0.40828402367

Calculate the square root of the right side: 0.638971066

Break this problem into two subproblems by setting 
(x + -0.1538461539) equal to 0.638971066 and -0.638971066.

Subproblem 1

x + -0.1538461539 = 0.638971066 Simplifying x + -0.1538461539 = 0.638971066 Reorder the terms: -0.1538461539 + x = 0.638971066 Solving -0.1538461539 + x = 0.638971066 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 = 0.638971066 + 0.1538461539 Combine like terms: -0.1538461539 + 0.1538461539 = 0.0000000000 0.0000000000 + x = 0.638971066 + 0.1538461539 x = 0.638971066 + 0.1538461539 Combine like terms: 0.638971066 + 0.1538461539 = 0.7928172199 x = 0.7928172199 Simplifying x = 0.7928172199

Subproblem 2

x + -0.1538461539 = -0.638971066 Simplifying x + -0.1538461539 = -0.638971066 Reorder the terms: -0.1538461539 + x = -0.638971066 Solving -0.1538461539 + x = -0.638971066 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 = -0.638971066 + 0.1538461539 Combine like terms: -0.1538461539 + 0.1538461539 = 0.0000000000 0.0000000000 + x = -0.638971066 + 0.1538461539 x = -0.638971066 + 0.1538461539 Combine like terms: -0.638971066 + 0.1538461539 = -0.4851249121 x = -0.4851249121 Simplifying x = -0.4851249121

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.7928172199, -0.4851249121}

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