2.59x^2-11.66x-6.48=0

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Solution for 2.59x^2-11.66x-6.48=0 equation:


Simplifying
2.59x2 + -11.66x + -6.48 = 0

Reorder the terms:
-6.48 + -11.66x + 2.59x2 = 0

Solving
-6.48 + -11.66x + 2.59x2 = 0

Solving for variable 'x'.

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

Divide each side by '2.59'.
-2.501930502 + -4.501930502x + x2 = 0

Move the constant term to the right:

Add '2.501930502' to each side of the equation.
-2.501930502 + -4.501930502x + 2.501930502 + x2 = 0 + 2.501930502

Reorder the terms:
-2.501930502 + 2.501930502 + -4.501930502x + x2 = 0 + 2.501930502

Combine like terms: -2.501930502 + 2.501930502 = 0.000000000
0.000000000 + -4.501930502x + x2 = 0 + 2.501930502
-4.501930502x + x2 = 0 + 2.501930502

Combine like terms: 0 + 2.501930502 = 2.501930502
-4.501930502x + x2 = 2.501930502

The x term is -4.501930502x.  Take half its coefficient (-2.250965251).
Square it (5.066844561) and add it to both sides.

Add '5.066844561' to each side of the equation.
-4.501930502x + 5.066844561 + x2 = 2.501930502 + 5.066844561

Reorder the terms:
5.066844561 + -4.501930502x + x2 = 2.501930502 + 5.066844561

Combine like terms: 2.501930502 + 5.066844561 = 7.568775063
5.066844561 + -4.501930502x + x2 = 7.568775063

Factor a perfect square on the left side:
(x + -2.250965251)(x + -2.250965251) = 7.568775063

Calculate the square root of the right side: 2.751140684

Break this problem into two subproblems by setting 
(x + -2.250965251) equal to 2.751140684 and -2.751140684.

Subproblem 1

x + -2.250965251 = 2.751140684 Simplifying x + -2.250965251 = 2.751140684 Reorder the terms: -2.250965251 + x = 2.751140684 Solving -2.250965251 + x = 2.751140684 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.250965251' to each side of the equation. -2.250965251 + 2.250965251 + x = 2.751140684 + 2.250965251 Combine like terms: -2.250965251 + 2.250965251 = 0.000000000 0.000000000 + x = 2.751140684 + 2.250965251 x = 2.751140684 + 2.250965251 Combine like terms: 2.751140684 + 2.250965251 = 5.002105935 x = 5.002105935 Simplifying x = 5.002105935

Subproblem 2

x + -2.250965251 = -2.751140684 Simplifying x + -2.250965251 = -2.751140684 Reorder the terms: -2.250965251 + x = -2.751140684 Solving -2.250965251 + x = -2.751140684 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.250965251' to each side of the equation. -2.250965251 + 2.250965251 + x = -2.751140684 + 2.250965251 Combine like terms: -2.250965251 + 2.250965251 = 0.000000000 0.000000000 + x = -2.751140684 + 2.250965251 x = -2.751140684 + 2.250965251 Combine like terms: -2.751140684 + 2.250965251 = -0.500175433 x = -0.500175433 Simplifying x = -0.500175433

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.002105935, -0.500175433}

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