6x^2+57x+56=0

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Solution for 6x^2+57x+56=0 equation:


Simplifying
6x2 + 57x + 56 = 0

Reorder the terms:
56 + 57x + 6x2 = 0

Solving
56 + 57x + 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'.
9.333333333 + 9.5x + x2 = 0

Move the constant term to the right:

Add '-9.333333333' to each side of the equation.
9.333333333 + 9.5x + -9.333333333 + x2 = 0 + -9.333333333

Reorder the terms:
9.333333333 + -9.333333333 + 9.5x + x2 = 0 + -9.333333333

Combine like terms: 9.333333333 + -9.333333333 = 0.000000000
0.000000000 + 9.5x + x2 = 0 + -9.333333333
9.5x + x2 = 0 + -9.333333333

Combine like terms: 0 + -9.333333333 = -9.333333333
9.5x + x2 = -9.333333333

The x term is 9.5x.  Take half its coefficient (4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
9.5x + 22.5625 + x2 = -9.333333333 + 22.5625

Reorder the terms:
22.5625 + 9.5x + x2 = -9.333333333 + 22.5625

Combine like terms: -9.333333333 + 22.5625 = 13.229166667
22.5625 + 9.5x + x2 = 13.229166667

Factor a perfect square on the left side:
(x + 4.75)(x + 4.75) = 13.229166667

Calculate the square root of the right side: 3.637192141

Break this problem into two subproblems by setting 
(x + 4.75) equal to 3.637192141 and -3.637192141.

Subproblem 1

x + 4.75 = 3.637192141 Simplifying x + 4.75 = 3.637192141 Reorder the terms: 4.75 + x = 3.637192141 Solving 4.75 + x = 3.637192141 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = 3.637192141 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = 3.637192141 + -4.75 x = 3.637192141 + -4.75 Combine like terms: 3.637192141 + -4.75 = -1.112807859 x = -1.112807859 Simplifying x = -1.112807859

Subproblem 2

x + 4.75 = -3.637192141 Simplifying x + 4.75 = -3.637192141 Reorder the terms: 4.75 + x = -3.637192141 Solving 4.75 + x = -3.637192141 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = -3.637192141 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = -3.637192141 + -4.75 x = -3.637192141 + -4.75 Combine like terms: -3.637192141 + -4.75 = -8.387192141 x = -8.387192141 Simplifying x = -8.387192141

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.112807859, -8.387192141}

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