4x^2+67x-334=0

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Solution for 4x^2+67x-334=0 equation:


Simplifying
4x2 + 67x + -334 = 0

Reorder the terms:
-334 + 67x + 4x2 = 0

Solving
-334 + 67x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-83.5 + 16.75x + x2 = 0

Move the constant term to the right:

Add '83.5' to each side of the equation.
-83.5 + 16.75x + 83.5 + x2 = 0 + 83.5

Reorder the terms:
-83.5 + 83.5 + 16.75x + x2 = 0 + 83.5

Combine like terms: -83.5 + 83.5 = 0.0
0.0 + 16.75x + x2 = 0 + 83.5
16.75x + x2 = 0 + 83.5

Combine like terms: 0 + 83.5 = 83.5
16.75x + x2 = 83.5

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 = 83.5 + 70.140625

Reorder the terms:
70.140625 + 16.75x + x2 = 83.5 + 70.140625

Combine like terms: 83.5 + 70.140625 = 153.640625
70.140625 + 16.75x + x2 = 153.640625

Factor a perfect square on the left side:
(x + 8.375)(x + 8.375) = 153.640625

Calculate the square root of the right side: 12.395185557

Break this problem into two subproblems by setting 
(x + 8.375) equal to 12.395185557 and -12.395185557.

Subproblem 1

x + 8.375 = 12.395185557 Simplifying x + 8.375 = 12.395185557 Reorder the terms: 8.375 + x = 12.395185557 Solving 8.375 + x = 12.395185557 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 = 12.395185557 + -8.375 Combine like terms: 8.375 + -8.375 = 0.000 0.000 + x = 12.395185557 + -8.375 x = 12.395185557 + -8.375 Combine like terms: 12.395185557 + -8.375 = 4.020185557 x = 4.020185557 Simplifying x = 4.020185557

Subproblem 2

x + 8.375 = -12.395185557 Simplifying x + 8.375 = -12.395185557 Reorder the terms: 8.375 + x = -12.395185557 Solving 8.375 + x = -12.395185557 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 = -12.395185557 + -8.375 Combine like terms: 8.375 + -8.375 = 0.000 0.000 + x = -12.395185557 + -8.375 x = -12.395185557 + -8.375 Combine like terms: -12.395185557 + -8.375 = -20.770185557 x = -20.770185557 Simplifying x = -20.770185557

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.020185557, -20.770185557}

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