15x^2-64x-3600=0

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Solution for 15x^2-64x-3600=0 equation:


Simplifying
15x2 + -64x + -3600 = 0

Reorder the terms:
-3600 + -64x + 15x2 = 0

Solving
-3600 + -64x + 15x2 = 0

Solving for variable 'x'.

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

Divide each side by '15'.
-240 + -4.266666667x + x2 = 0

Move the constant term to the right:

Add '240' to each side of the equation.
-240 + -4.266666667x + 240 + x2 = 0 + 240

Reorder the terms:
-240 + 240 + -4.266666667x + x2 = 0 + 240

Combine like terms: -240 + 240 = 0
0 + -4.266666667x + x2 = 0 + 240
-4.266666667x + x2 = 0 + 240

Combine like terms: 0 + 240 = 240
-4.266666667x + x2 = 240

The x term is -4.266666667x.  Take half its coefficient (-2.133333334).
Square it (4.551111114) and add it to both sides.

Add '4.551111114' to each side of the equation.
-4.266666667x + 4.551111114 + x2 = 240 + 4.551111114

Reorder the terms:
4.551111114 + -4.266666667x + x2 = 240 + 4.551111114

Combine like terms: 240 + 4.551111114 = 244.551111114
4.551111114 + -4.266666667x + x2 = 244.551111114

Factor a perfect square on the left side:
(x + -2.133333334)(x + -2.133333334) = 244.551111114

Calculate the square root of the right side: 15.638130039

Break this problem into two subproblems by setting 
(x + -2.133333334) equal to 15.638130039 and -15.638130039.

Subproblem 1

x + -2.133333334 = 15.638130039 Simplifying x + -2.133333334 = 15.638130039 Reorder the terms: -2.133333334 + x = 15.638130039 Solving -2.133333334 + x = 15.638130039 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.133333334' to each side of the equation. -2.133333334 + 2.133333334 + x = 15.638130039 + 2.133333334 Combine like terms: -2.133333334 + 2.133333334 = 0.000000000 0.000000000 + x = 15.638130039 + 2.133333334 x = 15.638130039 + 2.133333334 Combine like terms: 15.638130039 + 2.133333334 = 17.771463373 x = 17.771463373 Simplifying x = 17.771463373

Subproblem 2

x + -2.133333334 = -15.638130039 Simplifying x + -2.133333334 = -15.638130039 Reorder the terms: -2.133333334 + x = -15.638130039 Solving -2.133333334 + x = -15.638130039 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.133333334' to each side of the equation. -2.133333334 + 2.133333334 + x = -15.638130039 + 2.133333334 Combine like terms: -2.133333334 + 2.133333334 = 0.000000000 0.000000000 + x = -15.638130039 + 2.133333334 x = -15.638130039 + 2.133333334 Combine like terms: -15.638130039 + 2.133333334 = -13.504796705 x = -13.504796705 Simplifying x = -13.504796705

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.771463373, -13.504796705}

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