.16x^2+104x+56=0

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Solution for .16x^2+104x+56=0 equation:


Simplifying
0.16x2 + 104x + 56 = 0

Reorder the terms:
56 + 104x + 0.16x2 = 0

Solving
56 + 104x + 0.16x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.16'.
350 + 650x + x2 = 0

Move the constant term to the right:

Add '-350' to each side of the equation.
350 + 650x + -350 + x2 = 0 + -350

Reorder the terms:
350 + -350 + 650x + x2 = 0 + -350

Combine like terms: 350 + -350 = 0
0 + 650x + x2 = 0 + -350
650x + x2 = 0 + -350

Combine like terms: 0 + -350 = -350
650x + x2 = -350

The x term is 650x.  Take half its coefficient (325).
Square it (105625) and add it to both sides.

Add '105625' to each side of the equation.
650x + 105625 + x2 = -350 + 105625

Reorder the terms:
105625 + 650x + x2 = -350 + 105625

Combine like terms: -350 + 105625 = 105275
105625 + 650x + x2 = 105275

Factor a perfect square on the left side:
(x + 325)(x + 325) = 105275

Calculate the square root of the right side: 324.461091658

Break this problem into two subproblems by setting 
(x + 325) equal to 324.461091658 and -324.461091658.

Subproblem 1

x + 325 = 324.461091658 Simplifying x + 325 = 324.461091658 Reorder the terms: 325 + x = 324.461091658 Solving 325 + x = 324.461091658 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-325' to each side of the equation. 325 + -325 + x = 324.461091658 + -325 Combine like terms: 325 + -325 = 0 0 + x = 324.461091658 + -325 x = 324.461091658 + -325 Combine like terms: 324.461091658 + -325 = -0.538908342 x = -0.538908342 Simplifying x = -0.538908342

Subproblem 2

x + 325 = -324.461091658 Simplifying x + 325 = -324.461091658 Reorder the terms: 325 + x = -324.461091658 Solving 325 + x = -324.461091658 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-325' to each side of the equation. 325 + -325 + x = -324.461091658 + -325 Combine like terms: 325 + -325 = 0 0 + x = -324.461091658 + -325 x = -324.461091658 + -325 Combine like terms: -324.461091658 + -325 = -649.461091658 x = -649.461091658 Simplifying x = -649.461091658

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.538908342, -649.461091658}

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