4x^2+43x+57=0

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Solution for 4x^2+43x+57=0 equation:


Simplifying
4x2 + 43x + 57 = 0

Reorder the terms:
57 + 43x + 4x2 = 0

Solving
57 + 43x + 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'.
14.25 + 10.75x + x2 = 0

Move the constant term to the right:

Add '-14.25' to each side of the equation.
14.25 + 10.75x + -14.25 + x2 = 0 + -14.25

Reorder the terms:
14.25 + -14.25 + 10.75x + x2 = 0 + -14.25

Combine like terms: 14.25 + -14.25 = 0.00
0.00 + 10.75x + x2 = 0 + -14.25
10.75x + x2 = 0 + -14.25

Combine like terms: 0 + -14.25 = -14.25
10.75x + x2 = -14.25

The x term is 10.75x.  Take half its coefficient (5.375).
Square it (28.890625) and add it to both sides.

Add '28.890625' to each side of the equation.
10.75x + 28.890625 + x2 = -14.25 + 28.890625

Reorder the terms:
28.890625 + 10.75x + x2 = -14.25 + 28.890625

Combine like terms: -14.25 + 28.890625 = 14.640625
28.890625 + 10.75x + x2 = 14.640625

Factor a perfect square on the left side:
(x + 5.375)(x + 5.375) = 14.640625

Calculate the square root of the right side: 3.826306966

Break this problem into two subproblems by setting 
(x + 5.375) equal to 3.826306966 and -3.826306966.

Subproblem 1

x + 5.375 = 3.826306966 Simplifying x + 5.375 = 3.826306966 Reorder the terms: 5.375 + x = 3.826306966 Solving 5.375 + x = 3.826306966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.375' to each side of the equation. 5.375 + -5.375 + x = 3.826306966 + -5.375 Combine like terms: 5.375 + -5.375 = 0.000 0.000 + x = 3.826306966 + -5.375 x = 3.826306966 + -5.375 Combine like terms: 3.826306966 + -5.375 = -1.548693034 x = -1.548693034 Simplifying x = -1.548693034

Subproblem 2

x + 5.375 = -3.826306966 Simplifying x + 5.375 = -3.826306966 Reorder the terms: 5.375 + x = -3.826306966 Solving 5.375 + x = -3.826306966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.375' to each side of the equation. 5.375 + -5.375 + x = -3.826306966 + -5.375 Combine like terms: 5.375 + -5.375 = 0.000 0.000 + x = -3.826306966 + -5.375 x = -3.826306966 + -5.375 Combine like terms: -3.826306966 + -5.375 = -9.201306966 x = -9.201306966 Simplifying x = -9.201306966

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.548693034, -9.201306966}

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