6x^2-7x-100=0

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Solution for 6x^2-7x-100=0 equation:


Simplifying
6x2 + -7x + -100 = 0

Reorder the terms:
-100 + -7x + 6x2 = 0

Solving
-100 + -7x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-16.66666667 + -1.166666667x + x2 = 0

Move the constant term to the right:

Add '16.66666667' to each side of the equation.
-16.66666667 + -1.166666667x + 16.66666667 + x2 = 0 + 16.66666667

Reorder the terms:
-16.66666667 + 16.66666667 + -1.166666667x + x2 = 0 + 16.66666667

Combine like terms: -16.66666667 + 16.66666667 = 0.00000000
0.00000000 + -1.166666667x + x2 = 0 + 16.66666667
-1.166666667x + x2 = 0 + 16.66666667

Combine like terms: 0 + 16.66666667 = 16.66666667
-1.166666667x + x2 = 16.66666667

The x term is -1.166666667x.  Take half its coefficient (-0.5833333335).
Square it (0.3402777780) and add it to both sides.

Add '0.3402777780' to each side of the equation.
-1.166666667x + 0.3402777780 + x2 = 16.66666667 + 0.3402777780

Reorder the terms:
0.3402777780 + -1.166666667x + x2 = 16.66666667 + 0.3402777780

Combine like terms: 16.66666667 + 0.3402777780 = 17.006944448
0.3402777780 + -1.166666667x + x2 = 17.006944448

Factor a perfect square on the left side:
(x + -0.5833333335)(x + -0.5833333335) = 17.006944448

Calculate the square root of the right side: 4.123947678

Break this problem into two subproblems by setting 
(x + -0.5833333335) equal to 4.123947678 and -4.123947678.

Subproblem 1

x + -0.5833333335 = 4.123947678 Simplifying x + -0.5833333335 = 4.123947678 Reorder the terms: -0.5833333335 + x = 4.123947678 Solving -0.5833333335 + x = 4.123947678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5833333335' to each side of the equation. -0.5833333335 + 0.5833333335 + x = 4.123947678 + 0.5833333335 Combine like terms: -0.5833333335 + 0.5833333335 = 0.0000000000 0.0000000000 + x = 4.123947678 + 0.5833333335 x = 4.123947678 + 0.5833333335 Combine like terms: 4.123947678 + 0.5833333335 = 4.7072810115 x = 4.7072810115 Simplifying x = 4.7072810115

Subproblem 2

x + -0.5833333335 = -4.123947678 Simplifying x + -0.5833333335 = -4.123947678 Reorder the terms: -0.5833333335 + x = -4.123947678 Solving -0.5833333335 + x = -4.123947678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5833333335' to each side of the equation. -0.5833333335 + 0.5833333335 + x = -4.123947678 + 0.5833333335 Combine like terms: -0.5833333335 + 0.5833333335 = 0.0000000000 0.0000000000 + x = -4.123947678 + 0.5833333335 x = -4.123947678 + 0.5833333335 Combine like terms: -4.123947678 + 0.5833333335 = -3.5406143445 x = -3.5406143445 Simplifying x = -3.5406143445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.7072810115, -3.5406143445}

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