8x^2+67x-334=0

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Solution for 8x^2+67x-334=0 equation:


Simplifying
8x2 + 67x + -334 = 0

Reorder the terms:
-334 + 67x + 8x2 = 0

Solving
-334 + 67x + 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'.
-41.75 + 8.375x + x2 = 0

Move the constant term to the right:

Add '41.75' to each side of the equation.
-41.75 + 8.375x + 41.75 + x2 = 0 + 41.75

Reorder the terms:
-41.75 + 41.75 + 8.375x + x2 = 0 + 41.75

Combine like terms: -41.75 + 41.75 = 0.00
0.00 + 8.375x + x2 = 0 + 41.75
8.375x + x2 = 0 + 41.75

Combine like terms: 0 + 41.75 = 41.75
8.375x + x2 = 41.75

The x term is 8.375x.  Take half its coefficient (4.1875).
Square it (17.53515625) and add it to both sides.

Add '17.53515625' to each side of the equation.
8.375x + 17.53515625 + x2 = 41.75 + 17.53515625

Reorder the terms:
17.53515625 + 8.375x + x2 = 41.75 + 17.53515625

Combine like terms: 41.75 + 17.53515625 = 59.28515625
17.53515625 + 8.375x + x2 = 59.28515625

Factor a perfect square on the left side:
(x + 4.1875)(x + 4.1875) = 59.28515625

Calculate the square root of the right side: 7.699685464

Break this problem into two subproblems by setting 
(x + 4.1875) equal to 7.699685464 and -7.699685464.

Subproblem 1

x + 4.1875 = 7.699685464 Simplifying x + 4.1875 = 7.699685464 Reorder the terms: 4.1875 + x = 7.699685464 Solving 4.1875 + x = 7.699685464 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.1875' to each side of the equation. 4.1875 + -4.1875 + x = 7.699685464 + -4.1875 Combine like terms: 4.1875 + -4.1875 = 0.0000 0.0000 + x = 7.699685464 + -4.1875 x = 7.699685464 + -4.1875 Combine like terms: 7.699685464 + -4.1875 = 3.512185464 x = 3.512185464 Simplifying x = 3.512185464

Subproblem 2

x + 4.1875 = -7.699685464 Simplifying x + 4.1875 = -7.699685464 Reorder the terms: 4.1875 + x = -7.699685464 Solving 4.1875 + x = -7.699685464 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.1875' to each side of the equation. 4.1875 + -4.1875 + x = -7.699685464 + -4.1875 Combine like terms: 4.1875 + -4.1875 = 0.0000 0.0000 + x = -7.699685464 + -4.1875 x = -7.699685464 + -4.1875 Combine like terms: -7.699685464 + -4.1875 = -11.887185464 x = -11.887185464 Simplifying x = -11.887185464

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.512185464, -11.887185464}

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