5x^2+6x-13=0

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Solution for 5x^2+6x-13=0 equation:


Simplifying
5x2 + 6x + -13 = 0

Reorder the terms:
-13 + 6x + 5x2 = 0

Solving
-13 + 6x + 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'.
-2.6 + 1.2x + x2 = 0

Move the constant term to the right:

Add '2.6' to each side of the equation.
-2.6 + 1.2x + 2.6 + x2 = 0 + 2.6

Reorder the terms:
-2.6 + 2.6 + 1.2x + x2 = 0 + 2.6

Combine like terms: -2.6 + 2.6 = 0.0
0.0 + 1.2x + x2 = 0 + 2.6
1.2x + x2 = 0 + 2.6

Combine like terms: 0 + 2.6 = 2.6
1.2x + x2 = 2.6

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = 2.6 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = 2.6 + 0.36

Combine like terms: 2.6 + 0.36 = 2.96
0.36 + 1.2x + x2 = 2.96

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = 2.96

Calculate the square root of the right side: 1.720465053

Break this problem into two subproblems by setting 
(x + 0.6) equal to 1.720465053 and -1.720465053.

Subproblem 1

x + 0.6 = 1.720465053 Simplifying x + 0.6 = 1.720465053 Reorder the terms: 0.6 + x = 1.720465053 Solving 0.6 + x = 1.720465053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 1.720465053 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 1.720465053 + -0.6 x = 1.720465053 + -0.6 Combine like terms: 1.720465053 + -0.6 = 1.120465053 x = 1.120465053 Simplifying x = 1.120465053

Subproblem 2

x + 0.6 = -1.720465053 Simplifying x + 0.6 = -1.720465053 Reorder the terms: 0.6 + x = -1.720465053 Solving 0.6 + x = -1.720465053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -1.720465053 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -1.720465053 + -0.6 x = -1.720465053 + -0.6 Combine like terms: -1.720465053 + -0.6 = -2.320465053 x = -2.320465053 Simplifying x = -2.320465053

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.120465053, -2.320465053}

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