5x^2-13x-2=0

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Solution for 5x^2-13x-2=0 equation:


Simplifying
5x2 + -13x + -2 = 0

Reorder the terms:
-2 + -13x + 5x2 = 0

Solving
-2 + -13x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-0.4 + -2.6x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -2.6x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -2.6x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -2.6x + x2 = 0 + 0.4
-2.6x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-2.6x + x2 = 0.4

The x term is -2.6x.  Take half its coefficient (-1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
-2.6x + 1.69 + x2 = 0.4 + 1.69

Reorder the terms:
1.69 + -2.6x + x2 = 0.4 + 1.69

Combine like terms: 0.4 + 1.69 = 2.09
1.69 + -2.6x + x2 = 2.09

Factor a perfect square on the left side:
(x + -1.3)(x + -1.3) = 2.09

Calculate the square root of the right side: 1.445683229

Break this problem into two subproblems by setting 
(x + -1.3) equal to 1.445683229 and -1.445683229.

Subproblem 1

x + -1.3 = 1.445683229 Simplifying x + -1.3 = 1.445683229 Reorder the terms: -1.3 + x = 1.445683229 Solving -1.3 + x = 1.445683229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + x = 1.445683229 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + x = 1.445683229 + 1.3 x = 1.445683229 + 1.3 Combine like terms: 1.445683229 + 1.3 = 2.745683229 x = 2.745683229 Simplifying x = 2.745683229

Subproblem 2

x + -1.3 = -1.445683229 Simplifying x + -1.3 = -1.445683229 Reorder the terms: -1.3 + x = -1.445683229 Solving -1.3 + x = -1.445683229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + x = -1.445683229 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + x = -1.445683229 + 1.3 x = -1.445683229 + 1.3 Combine like terms: -1.445683229 + 1.3 = -0.145683229 x = -0.145683229 Simplifying x = -0.145683229

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.745683229, -0.145683229}

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