7x^2-37x-36=0

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Solution for 7x^2-37x-36=0 equation:


Simplifying
7x2 + -37x + -36 = 0

Reorder the terms:
-36 + -37x + 7x2 = 0

Solving
-36 + -37x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-5.142857143 + -5.285714286x + x2 = 0

Move the constant term to the right:

Add '5.142857143' to each side of the equation.
-5.142857143 + -5.285714286x + 5.142857143 + x2 = 0 + 5.142857143

Reorder the terms:
-5.142857143 + 5.142857143 + -5.285714286x + x2 = 0 + 5.142857143

Combine like terms: -5.142857143 + 5.142857143 = 0.000000000
0.000000000 + -5.285714286x + x2 = 0 + 5.142857143
-5.285714286x + x2 = 0 + 5.142857143

Combine like terms: 0 + 5.142857143 = 5.142857143
-5.285714286x + x2 = 5.142857143

The x term is -5.285714286x.  Take half its coefficient (-2.642857143).
Square it (6.984693878) and add it to both sides.

Add '6.984693878' to each side of the equation.
-5.285714286x + 6.984693878 + x2 = 5.142857143 + 6.984693878

Reorder the terms:
6.984693878 + -5.285714286x + x2 = 5.142857143 + 6.984693878

Combine like terms: 5.142857143 + 6.984693878 = 12.127551021
6.984693878 + -5.285714286x + x2 = 12.127551021

Factor a perfect square on the left side:
(x + -2.642857143)(x + -2.642857143) = 12.127551021

Calculate the square root of the right side: 3.482463355

Break this problem into two subproblems by setting 
(x + -2.642857143) equal to 3.482463355 and -3.482463355.

Subproblem 1

x + -2.642857143 = 3.482463355 Simplifying x + -2.642857143 = 3.482463355 Reorder the terms: -2.642857143 + x = 3.482463355 Solving -2.642857143 + x = 3.482463355 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.642857143' to each side of the equation. -2.642857143 + 2.642857143 + x = 3.482463355 + 2.642857143 Combine like terms: -2.642857143 + 2.642857143 = 0.000000000 0.000000000 + x = 3.482463355 + 2.642857143 x = 3.482463355 + 2.642857143 Combine like terms: 3.482463355 + 2.642857143 = 6.125320498 x = 6.125320498 Simplifying x = 6.125320498

Subproblem 2

x + -2.642857143 = -3.482463355 Simplifying x + -2.642857143 = -3.482463355 Reorder the terms: -2.642857143 + x = -3.482463355 Solving -2.642857143 + x = -3.482463355 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.642857143' to each side of the equation. -2.642857143 + 2.642857143 + x = -3.482463355 + 2.642857143 Combine like terms: -2.642857143 + 2.642857143 = 0.000000000 0.000000000 + x = -3.482463355 + 2.642857143 x = -3.482463355 + 2.642857143 Combine like terms: -3.482463355 + 2.642857143 = -0.839606212 x = -0.839606212 Simplifying x = -0.839606212

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.125320498, -0.839606212}

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