6x^2+7x-36=0

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Solution for 6x^2+7x-36=0 equation:


Simplifying
6x2 + 7x + -36 = 0

Reorder the terms:
-36 + 7x + 6x2 = 0

Solving
-36 + 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'.
-6 + 1.166666667x + x2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + 1.166666667x + 6 + x2 = 0 + 6

Reorder the terms:
-6 + 6 + 1.166666667x + x2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 1.166666667x + x2 = 0 + 6
1.166666667x + x2 = 0 + 6

Combine like terms: 0 + 6 = 6
1.166666667x + x2 = 6

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 = 6 + 0.3402777780

Reorder the terms:
0.3402777780 + 1.166666667x + x2 = 6 + 0.3402777780

Combine like terms: 6 + 0.3402777780 = 6.340277778
0.3402777780 + 1.166666667x + x2 = 6.340277778

Factor a perfect square on the left side:
(x + 0.5833333335)(x + 0.5833333335) = 6.340277778

Calculate the square root of the right side: 2.517990822

Break this problem into two subproblems by setting 
(x + 0.5833333335) equal to 2.517990822 and -2.517990822.

Subproblem 1

x + 0.5833333335 = 2.517990822 Simplifying x + 0.5833333335 = 2.517990822 Reorder the terms: 0.5833333335 + x = 2.517990822 Solving 0.5833333335 + x = 2.517990822 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 = 2.517990822 + -0.5833333335 Combine like terms: 0.5833333335 + -0.5833333335 = 0.0000000000 0.0000000000 + x = 2.517990822 + -0.5833333335 x = 2.517990822 + -0.5833333335 Combine like terms: 2.517990822 + -0.5833333335 = 1.9346574885 x = 1.9346574885 Simplifying x = 1.9346574885

Subproblem 2

x + 0.5833333335 = -2.517990822 Simplifying x + 0.5833333335 = -2.517990822 Reorder the terms: 0.5833333335 + x = -2.517990822 Solving 0.5833333335 + x = -2.517990822 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 = -2.517990822 + -0.5833333335 Combine like terms: 0.5833333335 + -0.5833333335 = 0.0000000000 0.0000000000 + x = -2.517990822 + -0.5833333335 x = -2.517990822 + -0.5833333335 Combine like terms: -2.517990822 + -0.5833333335 = -3.1013241555 x = -3.1013241555 Simplifying x = -3.1013241555

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.9346574885, -3.1013241555}

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