-3.25x^2-6x+76=0

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Solution for -3.25x^2-6x+76=0 equation:


Simplifying
-3.25x2 + -6x + 76 = 0

Reorder the terms:
76 + -6x + -3.25x2 = 0

Solving
76 + -6x + -3.25x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-3.25 the coefficient of the squared term: 

Divide each side by '-3.25'.
-23.38461538 + 1.846153846x + x2 = 0

Move the constant term to the right:

Add '23.38461538' to each side of the equation.
-23.38461538 + 1.846153846x + 23.38461538 + x2 = 0 + 23.38461538

Reorder the terms:
-23.38461538 + 23.38461538 + 1.846153846x + x2 = 0 + 23.38461538

Combine like terms: -23.38461538 + 23.38461538 = 0.00000000
0.00000000 + 1.846153846x + x2 = 0 + 23.38461538
1.846153846x + x2 = 0 + 23.38461538

Combine like terms: 0 + 23.38461538 = 23.38461538
1.846153846x + x2 = 23.38461538

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 = 23.38461538 + 0.8520710058

Reorder the terms:
0.8520710058 + 1.846153846x + x2 = 23.38461538 + 0.8520710058

Combine like terms: 23.38461538 + 0.8520710058 = 24.2366863858
0.8520710058 + 1.846153846x + x2 = 24.2366863858

Factor a perfect square on the left side:
(x + 0.923076923)(x + 0.923076923) = 24.2366863858

Calculate the square root of the right side: 4.923076923

Break this problem into two subproblems by setting 
(x + 0.923076923) equal to 4.923076923 and -4.923076923.

Subproblem 1

x + 0.923076923 = 4.923076923 Simplifying x + 0.923076923 = 4.923076923 Reorder the terms: 0.923076923 + x = 4.923076923 Solving 0.923076923 + x = 4.923076923 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 = 4.923076923 + -0.923076923 Combine like terms: 0.923076923 + -0.923076923 = 0.000000000 0.000000000 + x = 4.923076923 + -0.923076923 x = 4.923076923 + -0.923076923 Combine like terms: 4.923076923 + -0.923076923 = 4 x = 4 Simplifying x = 4

Subproblem 2

x + 0.923076923 = -4.923076923 Simplifying x + 0.923076923 = -4.923076923 Reorder the terms: 0.923076923 + x = -4.923076923 Solving 0.923076923 + x = -4.923076923 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 = -4.923076923 + -0.923076923 Combine like terms: 0.923076923 + -0.923076923 = 0.000000000 0.000000000 + x = -4.923076923 + -0.923076923 x = -4.923076923 + -0.923076923 Combine like terms: -4.923076923 + -0.923076923 = -5.846153846 x = -5.846153846 Simplifying x = -5.846153846

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4, -5.846153846}

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