0=4.3x^2-2.2x-2.6

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Solution for 0=4.3x^2-2.2x-2.6 equation:


Simplifying
0 = 4.3x2 + -2.2x + -2.6

Reorder the terms:
0 = -2.6 + -2.2x + 4.3x2

Solving
0 = -2.6 + -2.2x + 4.3x2

Solving for variable 'x'.

Combine like terms: 0 + 2.6 = 2.6
2.6 + 2.2x + -4.3x2 = -2.6 + -2.2x + 4.3x2 + 2.6 + 2.2x + -4.3x2

Reorder the terms:
2.6 + 2.2x + -4.3x2 = -2.6 + 2.6 + -2.2x + 2.2x + 4.3x2 + -4.3x2

Combine like terms: -2.6 + 2.6 = 0.0
2.6 + 2.2x + -4.3x2 = 0.0 + -2.2x + 2.2x + 4.3x2 + -4.3x2
2.6 + 2.2x + -4.3x2 = -2.2x + 2.2x + 4.3x2 + -4.3x2

Combine like terms: -2.2x + 2.2x = 0.0
2.6 + 2.2x + -4.3x2 = 0.0 + 4.3x2 + -4.3x2
2.6 + 2.2x + -4.3x2 = 4.3x2 + -4.3x2

Combine like terms: 4.3x2 + -4.3x2 = 0.0
2.6 + 2.2x + -4.3x2 = 0.0

Begin completing the square.  Divide all terms by
-4.3 the coefficient of the squared term: 

Divide each side by '-4.3'.
-0.6046511628 + -0.511627907x + x2 = 0

Move the constant term to the right:

Add '0.6046511628' to each side of the equation.
-0.6046511628 + -0.511627907x + 0.6046511628 + x2 = 0 + 0.6046511628

Reorder the terms:
-0.6046511628 + 0.6046511628 + -0.511627907x + x2 = 0 + 0.6046511628

Combine like terms: -0.6046511628 + 0.6046511628 = 0.0000000000
0.0000000000 + -0.511627907x + x2 = 0 + 0.6046511628
-0.511627907x + x2 = 0 + 0.6046511628

Combine like terms: 0 + 0.6046511628 = 0.6046511628
-0.511627907x + x2 = 0.6046511628

The x term is -0.511627907x.  Take half its coefficient (-0.2558139535).
Square it (0.06544077881) and add it to both sides.

Add '0.06544077881' to each side of the equation.
-0.511627907x + 0.06544077881 + x2 = 0.6046511628 + 0.06544077881

Reorder the terms:
0.06544077881 + -0.511627907x + x2 = 0.6046511628 + 0.06544077881

Combine like terms: 0.6046511628 + 0.06544077881 = 0.67009194161
0.06544077881 + -0.511627907x + x2 = 0.67009194161

Factor a perfect square on the left side:
(x + -0.2558139535)(x + -0.2558139535) = 0.67009194161

Calculate the square root of the right side: 0.818591438

Break this problem into two subproblems by setting 
(x + -0.2558139535) equal to 0.818591438 and -0.818591438.

Subproblem 1

x + -0.2558139535 = 0.818591438 Simplifying x + -0.2558139535 = 0.818591438 Reorder the terms: -0.2558139535 + x = 0.818591438 Solving -0.2558139535 + x = 0.818591438 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2558139535' to each side of the equation. -0.2558139535 + 0.2558139535 + x = 0.818591438 + 0.2558139535 Combine like terms: -0.2558139535 + 0.2558139535 = 0.0000000000 0.0000000000 + x = 0.818591438 + 0.2558139535 x = 0.818591438 + 0.2558139535 Combine like terms: 0.818591438 + 0.2558139535 = 1.0744053915 x = 1.0744053915 Simplifying x = 1.0744053915

Subproblem 2

x + -0.2558139535 = -0.818591438 Simplifying x + -0.2558139535 = -0.818591438 Reorder the terms: -0.2558139535 + x = -0.818591438 Solving -0.2558139535 + x = -0.818591438 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2558139535' to each side of the equation. -0.2558139535 + 0.2558139535 + x = -0.818591438 + 0.2558139535 Combine like terms: -0.2558139535 + 0.2558139535 = 0.0000000000 0.0000000000 + x = -0.818591438 + 0.2558139535 x = -0.818591438 + 0.2558139535 Combine like terms: -0.818591438 + 0.2558139535 = -0.5627774845 x = -0.5627774845 Simplifying x = -0.5627774845

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.0744053915, -0.5627774845}

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