26x^2+48x-9=0

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Solution for 26x^2+48x-9=0 equation:


Simplifying
26x2 + 48x + -9 = 0

Reorder the terms:
-9 + 48x + 26x2 = 0

Solving
-9 + 48x + 26x2 = 0

Solving for variable 'x'.

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

Divide each side by '26'.
-0.3461538462 + 1.846153846x + x2 = 0

Move the constant term to the right:

Add '0.3461538462' to each side of the equation.
-0.3461538462 + 1.846153846x + 0.3461538462 + x2 = 0 + 0.3461538462

Reorder the terms:
-0.3461538462 + 0.3461538462 + 1.846153846x + x2 = 0 + 0.3461538462

Combine like terms: -0.3461538462 + 0.3461538462 = 0.0000000000
0.0000000000 + 1.846153846x + x2 = 0 + 0.3461538462
1.846153846x + x2 = 0 + 0.3461538462

Combine like terms: 0 + 0.3461538462 = 0.3461538462
1.846153846x + x2 = 0.3461538462

The x term is 1.846153846x.  Take half its coefficient (0.923076923).
Square it (0.8520710058) and add it to both sides.

Add '0.8520710058' to each side of the equation.
1.846153846x + 0.8520710058 + x2 = 0.3461538462 + 0.8520710058

Reorder the terms:
0.8520710058 + 1.846153846x + x2 = 0.3461538462 + 0.8520710058

Combine like terms: 0.3461538462 + 0.8520710058 = 1.198224852
0.8520710058 + 1.846153846x + x2 = 1.198224852

Factor a perfect square on the left side:
(x + 0.923076923)(x + 0.923076923) = 1.198224852

Calculate the square root of the right side: 1.094634575

Break this problem into two subproblems by setting 
(x + 0.923076923) equal to 1.094634575 and -1.094634575.

Subproblem 1

x + 0.923076923 = 1.094634575 Simplifying x + 0.923076923 = 1.094634575 Reorder the terms: 0.923076923 + x = 1.094634575 Solving 0.923076923 + x = 1.094634575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.923076923' to each side of the equation. 0.923076923 + -0.923076923 + x = 1.094634575 + -0.923076923 Combine like terms: 0.923076923 + -0.923076923 = 0.000000000 0.000000000 + x = 1.094634575 + -0.923076923 x = 1.094634575 + -0.923076923 Combine like terms: 1.094634575 + -0.923076923 = 0.171557652 x = 0.171557652 Simplifying x = 0.171557652

Subproblem 2

x + 0.923076923 = -1.094634575 Simplifying x + 0.923076923 = -1.094634575 Reorder the terms: 0.923076923 + x = -1.094634575 Solving 0.923076923 + x = -1.094634575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.923076923' to each side of the equation. 0.923076923 + -0.923076923 + x = -1.094634575 + -0.923076923 Combine like terms: 0.923076923 + -0.923076923 = 0.000000000 0.000000000 + x = -1.094634575 + -0.923076923 x = -1.094634575 + -0.923076923 Combine like terms: -1.094634575 + -0.923076923 = -2.017711498 x = -2.017711498 Simplifying x = -2.017711498

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.171557652, -2.017711498}

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