2.4x^2+1.3x-5.2=0

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Solution for 2.4x^2+1.3x-5.2=0 equation:


Simplifying
2.4x2 + 1.3x + -5.2 = 0

Reorder the terms:
-5.2 + 1.3x + 2.4x2 = 0

Solving
-5.2 + 1.3x + 2.4x2 = 0

Solving for variable 'x'.

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

Divide each side by '2.4'.
-2.166666667 + 0.5416666667x + x2 = 0

Move the constant term to the right:

Add '2.166666667' to each side of the equation.
-2.166666667 + 0.5416666667x + 2.166666667 + x2 = 0 + 2.166666667

Reorder the terms:
-2.166666667 + 2.166666667 + 0.5416666667x + x2 = 0 + 2.166666667

Combine like terms: -2.166666667 + 2.166666667 = 0.000000000
0.000000000 + 0.5416666667x + x2 = 0 + 2.166666667
0.5416666667x + x2 = 0 + 2.166666667

Combine like terms: 0 + 2.166666667 = 2.166666667
0.5416666667x + x2 = 2.166666667

The x term is 0.5416666667x.  Take half its coefficient (0.2708333334).
Square it (0.07335069448) and add it to both sides.

Add '0.07335069448' to each side of the equation.
0.5416666667x + 0.07335069448 + x2 = 2.166666667 + 0.07335069448

Reorder the terms:
0.07335069448 + 0.5416666667x + x2 = 2.166666667 + 0.07335069448

Combine like terms: 2.166666667 + 0.07335069448 = 2.24001736148
0.07335069448 + 0.5416666667x + x2 = 2.24001736148

Factor a perfect square on the left side:
(x + 0.2708333334)(x + 0.2708333334) = 2.24001736148

Calculate the square root of the right side: 1.496668755

Break this problem into two subproblems by setting 
(x + 0.2708333334) equal to 1.496668755 and -1.496668755.

Subproblem 1

x + 0.2708333334 = 1.496668755 Simplifying x + 0.2708333334 = 1.496668755 Reorder the terms: 0.2708333334 + x = 1.496668755 Solving 0.2708333334 + x = 1.496668755 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2708333334' to each side of the equation. 0.2708333334 + -0.2708333334 + x = 1.496668755 + -0.2708333334 Combine like terms: 0.2708333334 + -0.2708333334 = 0.0000000000 0.0000000000 + x = 1.496668755 + -0.2708333334 x = 1.496668755 + -0.2708333334 Combine like terms: 1.496668755 + -0.2708333334 = 1.2258354216 x = 1.2258354216 Simplifying x = 1.2258354216

Subproblem 2

x + 0.2708333334 = -1.496668755 Simplifying x + 0.2708333334 = -1.496668755 Reorder the terms: 0.2708333334 + x = -1.496668755 Solving 0.2708333334 + x = -1.496668755 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2708333334' to each side of the equation. 0.2708333334 + -0.2708333334 + x = -1.496668755 + -0.2708333334 Combine like terms: 0.2708333334 + -0.2708333334 = 0.0000000000 0.0000000000 + x = -1.496668755 + -0.2708333334 x = -1.496668755 + -0.2708333334 Combine like terms: -1.496668755 + -0.2708333334 = -1.7675020884 x = -1.7675020884 Simplifying x = -1.7675020884

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2258354216, -1.7675020884}

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