5.2x^2+3.1x-2.5=0

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Solution for 5.2x^2+3.1x-2.5=0 equation:


Simplifying
5.2x2 + 3.1x + -2.5 = 0

Reorder the terms:
-2.5 + 3.1x + 5.2x2 = 0

Solving
-2.5 + 3.1x + 5.2x2 = 0

Solving for variable 'x'.

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

Divide each side by '5.2'.
-0.4807692308 + 0.5961538462x + x2 = 0

Move the constant term to the right:

Add '0.4807692308' to each side of the equation.
-0.4807692308 + 0.5961538462x + 0.4807692308 + x2 = 0 + 0.4807692308

Reorder the terms:
-0.4807692308 + 0.4807692308 + 0.5961538462x + x2 = 0 + 0.4807692308

Combine like terms: -0.4807692308 + 0.4807692308 = 0.0000000000
0.0000000000 + 0.5961538462x + x2 = 0 + 0.4807692308
0.5961538462x + x2 = 0 + 0.4807692308

Combine like terms: 0 + 0.4807692308 = 0.4807692308
0.5961538462x + x2 = 0.4807692308

The x term is 0.5961538462x.  Take half its coefficient (0.2980769231).
Square it (0.08884985208) and add it to both sides.

Add '0.08884985208' to each side of the equation.
0.5961538462x + 0.08884985208 + x2 = 0.4807692308 + 0.08884985208

Reorder the terms:
0.08884985208 + 0.5961538462x + x2 = 0.4807692308 + 0.08884985208

Combine like terms: 0.4807692308 + 0.08884985208 = 0.56961908288
0.08884985208 + 0.5961538462x + x2 = 0.56961908288

Factor a perfect square on the left side:
(x + 0.2980769231)(x + 0.2980769231) = 0.56961908288

Calculate the square root of the right side: 0.754731133

Break this problem into two subproblems by setting 
(x + 0.2980769231) equal to 0.754731133 and -0.754731133.

Subproblem 1

x + 0.2980769231 = 0.754731133 Simplifying x + 0.2980769231 = 0.754731133 Reorder the terms: 0.2980769231 + x = 0.754731133 Solving 0.2980769231 + x = 0.754731133 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2980769231' to each side of the equation. 0.2980769231 + -0.2980769231 + x = 0.754731133 + -0.2980769231 Combine like terms: 0.2980769231 + -0.2980769231 = 0.0000000000 0.0000000000 + x = 0.754731133 + -0.2980769231 x = 0.754731133 + -0.2980769231 Combine like terms: 0.754731133 + -0.2980769231 = 0.4566542099 x = 0.4566542099 Simplifying x = 0.4566542099

Subproblem 2

x + 0.2980769231 = -0.754731133 Simplifying x + 0.2980769231 = -0.754731133 Reorder the terms: 0.2980769231 + x = -0.754731133 Solving 0.2980769231 + x = -0.754731133 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2980769231' to each side of the equation. 0.2980769231 + -0.2980769231 + x = -0.754731133 + -0.2980769231 Combine like terms: 0.2980769231 + -0.2980769231 = 0.0000000000 0.0000000000 + x = -0.754731133 + -0.2980769231 x = -0.754731133 + -0.2980769231 Combine like terms: -0.754731133 + -0.2980769231 = -1.0528080561 x = -1.0528080561 Simplifying x = -1.0528080561

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.4566542099, -1.0528080561}

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