4x^2+23x-4=0

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Solution for 4x^2+23x-4=0 equation:


Simplifying
4x2 + 23x + -4 = 0

Reorder the terms:
-4 + 23x + 4x2 = 0

Solving
-4 + 23x + 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'.
-1 + 5.75x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 5.75x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 5.75x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 5.75x + x2 = 0 + 1
5.75x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
5.75x + x2 = 1

The x term is 5.75x.  Take half its coefficient (2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
5.75x + 8.265625 + x2 = 1 + 8.265625

Reorder the terms:
8.265625 + 5.75x + x2 = 1 + 8.265625

Combine like terms: 1 + 8.265625 = 9.265625
8.265625 + 5.75x + x2 = 9.265625

Factor a perfect square on the left side:
(x + 2.875)(x + 2.875) = 9.265625

Calculate the square root of the right side: 3.043948915

Break this problem into two subproblems by setting 
(x + 2.875) equal to 3.043948915 and -3.043948915.

Subproblem 1

x + 2.875 = 3.043948915 Simplifying x + 2.875 = 3.043948915 Reorder the terms: 2.875 + x = 3.043948915 Solving 2.875 + x = 3.043948915 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = 3.043948915 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = 3.043948915 + -2.875 x = 3.043948915 + -2.875 Combine like terms: 3.043948915 + -2.875 = 0.168948915 x = 0.168948915 Simplifying x = 0.168948915

Subproblem 2

x + 2.875 = -3.043948915 Simplifying x + 2.875 = -3.043948915 Reorder the terms: 2.875 + x = -3.043948915 Solving 2.875 + x = -3.043948915 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = -3.043948915 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = -3.043948915 + -2.875 x = -3.043948915 + -2.875 Combine like terms: -3.043948915 + -2.875 = -5.918948915 x = -5.918948915 Simplifying x = -5.918948915

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.168948915, -5.918948915}

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