8x^2+134x+245=0

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Solution for 8x^2+134x+245=0 equation:


Simplifying
8x2 + 134x + 245 = 0

Reorder the terms:
245 + 134x + 8x2 = 0

Solving
245 + 134x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
30.625 + 16.75x + x2 = 0

Move the constant term to the right:

Add '-30.625' to each side of the equation.
30.625 + 16.75x + -30.625 + x2 = 0 + -30.625

Reorder the terms:
30.625 + -30.625 + 16.75x + x2 = 0 + -30.625

Combine like terms: 30.625 + -30.625 = 0.000
0.000 + 16.75x + x2 = 0 + -30.625
16.75x + x2 = 0 + -30.625

Combine like terms: 0 + -30.625 = -30.625
16.75x + x2 = -30.625

The x term is 16.75x.  Take half its coefficient (8.375).
Square it (70.140625) and add it to both sides.

Add '70.140625' to each side of the equation.
16.75x + 70.140625 + x2 = -30.625 + 70.140625

Reorder the terms:
70.140625 + 16.75x + x2 = -30.625 + 70.140625

Combine like terms: -30.625 + 70.140625 = 39.515625
70.140625 + 16.75x + x2 = 39.515625

Factor a perfect square on the left side:
(x + 8.375)(x + 8.375) = 39.515625

Calculate the square root of the right side: 6.28614548

Break this problem into two subproblems by setting 
(x + 8.375) equal to 6.28614548 and -6.28614548.

Subproblem 1

x + 8.375 = 6.28614548 Simplifying x + 8.375 = 6.28614548 Reorder the terms: 8.375 + x = 6.28614548 Solving 8.375 + x = 6.28614548 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8.375' to each side of the equation. 8.375 + -8.375 + x = 6.28614548 + -8.375 Combine like terms: 8.375 + -8.375 = 0.000 0.000 + x = 6.28614548 + -8.375 x = 6.28614548 + -8.375 Combine like terms: 6.28614548 + -8.375 = -2.08885452 x = -2.08885452 Simplifying x = -2.08885452

Subproblem 2

x + 8.375 = -6.28614548 Simplifying x + 8.375 = -6.28614548 Reorder the terms: 8.375 + x = -6.28614548 Solving 8.375 + x = -6.28614548 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8.375' to each side of the equation. 8.375 + -8.375 + x = -6.28614548 + -8.375 Combine like terms: 8.375 + -8.375 = 0.000 0.000 + x = -6.28614548 + -8.375 x = -6.28614548 + -8.375 Combine like terms: -6.28614548 + -8.375 = -14.66114548 x = -14.66114548 Simplifying x = -14.66114548

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.08885452, -14.66114548}

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